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Versions: 00 01 02 03 04 05 06 07 10 RFC 6931

INTERNET-DRAFT                                           Donald Eastlake
Obsoletes: 4051                                                   Huawei
Intended Status: Proposed Standard
Expires: September 26, 2013                               March 27, 2013


      Additional XML Security Uniform Resource Identifiers (URIs)
             <draft-eastlake-additional-xmlsec-uris-10.txt>



Abstract

   This document obsoletes RFC 4051, expanding, updating, and
   esatablishing an IANA Registry for the list of URIs intended for use
   with XML Digital Signatures, Encryption, Canonicalization, and Key
   Management. These URIs identify algorithms and types of information.


Status of This Memo

   This Internet-Draft is submitted to IETF in full conformance with the
   provisions of BCP 78 and BCP 79.

   Distribution of this document is unlimited. Comments should be sent
   to the author.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups.  Note that
   other groups may also distribute working documents as Internet-
   Drafts.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   The list of current Internet-Drafts can be accessed at
   http://www.ietf.org/1id-abstracts.html. The list of Internet-Draft
   Shadow Directories can be accessed at
   http://www.ietf.org/shadow.html.














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Table of Contents

      1. Introduction............................................4
       1.1 Terminology...........................................5
       1.2 Acronyms..............................................5

      2. Algorithms..............................................6
       2.1 DigestMethod (Hash) Algorithms........................6
       2.1.1 MD5.................................................6
       2.1.2 SHA-224.............................................7
       2.1.3 SHA-384.............................................7
       2.1.4 Whirlpool...........................................7
       2.1.5 New SHA Functions...................................8
       2.2 SignatureMethod MAC Algorithms........................8
       2.2.1 HMAC-MD5............................................8
       2.2.2 HMAC SHA Variations.................................9
       2.2.3 HMAC-RIPEMD160......................................9
       2.3 SignatureMethod Public Key Signature Algorithms......10
       2.3.1 RSA-MD5............................................10
       2.3.2 RSA-SHA256.........................................11
       2.3.3 RSA-SHA384.........................................11
       2.3.4 RSA-SHA512.........................................11
       2.3.5 RSA-RIPEMD160......................................11
       2.3.6 ECDSA-SHA*, ECDSA-RIPEMD160, ECDSA-Whirlpool.......12
       2.3.7 ESIGN-SHA*.........................................12
       2.3.8 RSA-Whirlpool......................................13
       2.3.9 RSASSA-PSS With Parameters.........................13
       2.3.10 RSASSA-PSS Without Parameters.....................15
       2.3.11 RSA-SHA224........................................15
       2.4 Minimal Canonicalization.............................16
       2.5 Transform Algorithms.................................16
       2.5.1 XPointer...........................................16
       2.6 EncryptionMethod Algorithms..........................17
       2.6.1 ARCFOUR Encryption Algorithm.......................17
       2.6.2 Camellia Block Encryption..........................17
       2.6.3 Camellia Key Wrap..................................18
       2.6.4 PSEC-KEM...........................................18
       2.6.5 SEED Block Encryption..............................19
       2.6.6 SEED Key Wrap......................................19

      3. KeyInfo................................................20
       3.1 PKCS #7 Bag of Certificates and CRLs.................20
       3.2 Additional RetrievalMethod Type Values...............20

      4. Indexes................................................21
       4.1 Fragment Index.......................................21
       4.2 URI Index............................................24





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Table of Contents (continued)

      5. Allocation Considerations..............................28
       5.1 W3C Allocation Considerations........................28
       5.1 IANA Considerations..................................28

      6. Security Considerations................................29

      Acknowledgements..........................................30

      Appendix A: Changes from RFC 4051.........................31
      Appendix Z: Change History................................32

      Normative References......................................34
      Informational References..................................37

      Author's Address..........................................39



































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1. Introduction

   XML Digital Signatures, Canonicalization, and Encryption have been
   standardized by the W3C and by the joint IETF/W3C XMLDSIG working
   group [W3C]. All of these are now W3C Recommendations and some are
   also IETF RFCs.  They are available as follows:

    IETF level           W3C REC     Topic
    -----------          -------     -----

   [RFC3275] Draft Std  [XMLDSIG10] XML Digital Signatures
   [RFC3076] Info       [CANON10]   Canonical XML
    - - - - - -         [XMLENC10]  XML Encryption 1.0
   [RFC3741] Info       [XCANON]    Exclusive XML Canonicalization 1.0

   All of these standards and recommendations use URIs [RFC3986] to
   identify algorithms and keying information types. The W3C has
   subsequently produced updated XML Signature 1.1 [XMLDSIG11],
   Canonical XML 1.1 [CANON11], and XML Encryption 1.1 [XMLENC11]
   versions as well as a new XML Signature Properties specification
   [XMLDSIG-PROP].

   All camel case element names herein, such as DigestValue, are from
   these documents.

   This document is an updated convenient reference list of URIs and
   corresponding algorithms in which there is expressed interest. There
   have been significant new cryptographic algorithms of interest to XML
   security, for some of which the URI is only specified in this
   document, added since the previous list [RFC4051], was issued in
   2005.  This document obsoletes [RFC4051]. All of the URIs appear in
   the Section 4 indexes below. Subsections about one of the URIs appear
   in Section 2 or 3 only for those URIs added by [RFC4051] or this
   document and for Minimal Canoncialization (Section 2.4). For example,
   use of SHA-256 is defined in [XMLENC11] and hence there is no sub-
   section on that algorithm here but its URI is included in the Section
   4 indexes.

   Specification in this document of the URI representing an algorithm
   does not imply endorsement of the algorithm for any particular
   purpose. Protocol specifications, which this is not, generally give
   algorithm and implementation requirements for those protocols.
   Security considerations for algorithms are constantly evolving, as
   documented elsewhere. This specification simply provides some URIs
   and relevant formatting for when those URIs are used.

   Note that progressing XML Digital Signature [RFC3275] along the
   standards track required removal of any algorithms from the original
   version [RFC3075] for which there was not demonstrated
   interoperability.  This required removal of the Minimal


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   Canonicalization algorithm, in which there appears to be continued
   interest. The URI for Minimal Canonicalization was included in
   [RFC4051] and is included here.



1.1 Terminology

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in
   [RFC2119].

   This document is not intended to change the slgotithm implementation
   requirements of any IETF or W3C document. Use of [RFC2119]
   terminology is intended to be only such as is already stated or
   implied by other authoritative documents.



1.2 Acronyms

   The following acronyms are used in this document:

       HMAC - Keyed-Hashing MAC [RFC2104]

       IETF - Internet Engineering Task Force <www.ietf.org>

       MAC - Message Authentication Code

       MD - Message Digest

       NIST - United States National Institute of Standards and
             Technology <www.nist.gov>

       RC - Rivest Cipher

       RSA - Rivest, Shamir, and Adleman

       SHA - Secure Hash Algorithm

       URI - Uniform Resource Identifier [RFC3986]

       W3C - World Wide Web Consortium <www.w3.org>

       XML - eXtensible Markup Language






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2. Algorithms

   The URI [RFC3986] that was dropped from the XML Digitial Signature
   standard due to the transition from IETF Proposed Standard to Draft
   Standard [RFC3275] is included in section 2.4 below with its original

        http://www.w3.org/2000/09/xmldsig#

   prefix so as to avoid changing the XMLDSIG standard's namespace.

   Additional algorithms in [RFC4051] were given URIs that start with

        http://www.w3.org/2001/04/xmldsig-more#

   while further algorithms added in this document are given URIs that
   start with

        http://www.w3.org/2007/05/xmldsig-more#

   In addition, for ease of reference, this document includes in the
   indexes in Section 4 many cryptographic algorithm URIs from several
   XML security documents using the namespaces with which they are
   defined in those documents. For example, 2000/09/xmldsig# for some
   URIs specified in [RFC3275] and 2001/04/xmlenc# for some URIs
   specified in [XMLENC10].

   See also [XMLSECXREF].



2.1 DigestMethod (Hash) Algorithms

   These algorithms are usable wherever a DigestMethod element occurs.



2.1.1 MD5

   Identifier:
        http://www.w3.org/2001/04/xmldsig-more#md5

   The MD5 algorithm [RFC1321] takes no explicit parameters. An example
   of an MD5 DigestAlgorithm element is:

   <DigestAlgorithm
      Algorithm="http://www.w3.org/2001/04/xmldsig-more#md5"/>

   An MD5 digest is a 128-bit string. The content of the DigestValue
   element SHALL be the base64 [RFC2045] encoding of this bit string
   viewed as a 16-octet octet stream. See [RFC6151] for MD5 security


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   considerations.



2.1.2 SHA-224

   Identifier:
        http://www.w3.org/2001/04/xmldsig-more#sha224

   The SHA-224 algorithm [FIPS180-4] [RFC6234] takes no explicit
   parameters.  An example of a SHA-224 DigestAlgorithm element is:

   <DigestAlgorithm
      Algorithm="http://www.w3.org/2001/04/xmldsig-more#sha224" />

   A SHA-224 digest is a 224 bit string. The content of the DigestValue
   element SHALL be the base64 [RFC2045] encoding of this string viewed
   as a 28-octet stream.



2.1.3 SHA-384

   Identifier:
        http://www.w3.org/2001/04/xmldsig-more#sha384

   The SHA-384 algorithm [FIPS180-4] takes no explicit parameters.  An
   example of a SHA-384 DigestAlgorithm element is:

   <DigestAlgorithm
      Algorithm="http://www.w3.org/2001/04/xmldsig-more#sha384" />

   A SHA-384 digest is a 384 bit string. The content of the DigestValue
   element SHALL be the base64 [RFC2045] encoding of this string viewed
   as a 48-octet stream.



2.1.4 Whirlpool

   Identifier:
        http://www.w3.org/2007/05/xmldsig-more#whirlpool

   The Whirlpool algorithm [10118-3] takes no explicit parameters.  A
   Whirlpool digest is a 512 bit string.  The content of the DigestValue
   element SHALL be the base64 [RFC2045] encoding of this string viewed
   as a 64 octet stream.





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2.1.5 New SHA Functions

   Identifiers:
        http://www.w3.org/2007/05/xmldsig-more#sha3-224
        http://www.w3.org/2007/05/xmldsig-more#sha3-256
        http://www.w3.org/2007/05/xmldsig-more#sha3-384
        http://www.w3.org/2007/05/xmldsig-more#sha3-512

   NIST has recently completed a hash function competition for an
   alternative to the SHA family.  The Keccak-f[1600] algorithm was
   selected [Keccak]. This hash function is commonly referred to as
   "SHA-3" and this section is a space holder and reservation of URIs
   for future information on Keccak use in XML security.

   A SHA-3 224, 256, 384, and 512 digest is a 224, 256, 384, and 512 bit
   string, respectively.  The content of the DigestValue element SHALL
   be the base64 [RFC2045] encoding of this string viewed as a 28-, 32-,
   48-, and 64-octet stream, respectively.



2.2 SignatureMethod MAC Algorithms

   This section covers SignatureMethod MAC (Message Authentication Code)
   Algorithms.

   Note: Some text in this section is duplicated from [RFC3275] for the
   convenience of the reader. RFC 3275 is normative in case of conflict.



2.2.1 HMAC-MD5

   Identifier:
        http://www.w3.org/2001/04/xmldsig-more#hmac-md5

   The HMAC algorithm [RFC2104] takes the truncation length in bits as a
   parameter; if the parameter is not specified then all the bits of the
   hash are output. An example of an HMAC-MD5 SignatureMethod element is
   as follows:

   <SignatureMethod
      Algorithm="http://www.w3.org/2001/04/xmldsig-more#hmac-md5">
      <HMACOutputLength>112</HMACOutputLength>
   </SignatureMethod>

   The output of the HMAC algorithm is ultimately the output (possibly
   truncated) of the chosen digest algorithm. This value SHALL be base64
   [RFC2045] encoded in the same straightforward fashion as the output
   of the digest algorithms. Example: the SignatureValue element for the


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   HMAC-MD5 digest

        9294727A 3638BB1C 13F48EF8 158BFC9D

   from the test vectors in [RFC2104] would be

        kpRyejY4uxwT9I74FYv8nQ==

   Schema Definition:

        <simpleType name="HMACOutputLength">
           <restriction base="integer">
        </simpleType>

   DTD:

        <!ELEMENT HMACOutputLength (#PCDATA) >

   The Schema Definition and DTD immediately above are copied from
   [RFC3275].

   See [RFC6151] for HMAC-MD5 security considerations.



2.2.2 HMAC SHA Variations

   Identifiers:
        http://www.w3.org/2001/04/xmldsig-more#hmac-sha224
        http://www.w3.org/2001/04/xmldsig-more#hmac-sha256
        http://www.w3.org/2001/04/xmldsig-more#hmac-sha384
        http://www.w3.org/2001/04/xmldsig-more#hmac-sha512

   SHA-224, SHA-256, SHA-384, and SHA-512 [FIPS180-4] [RFC6234] can also
   be used in HMAC as described in section 2.2.1 above for HMAC-MD5.



2.2.3 HMAC-RIPEMD160

   Identifier:
        http://www.w3.org/2001/04/xmldsig-more#hmac-ripemd160

   RIPEMD-160 [RIPEMD-160] can also be used in HMAC as described in
   section 2.2.1 above for HMAC-MD5.







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2.3 SignatureMethod Public Key Signature Algorithms

   These algorithms are distinguished from those in section 2.2 above in
   that they use public key methods. That is to say, the verification
   key is different from and not feasibly derivable from the signing
   key.



2.3.1 RSA-MD5

   Identifier:
        http://www.w3.org/2001/04/xmldsig-more#rsa-md5

   This implies the PKCS#1 v1.5 padding algorithm described in
   [RFC3447]. An example of use is

   <SignatureMethod
      Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-md5" />

   The SignatureValue content for an RSA-MD5 signature is the base64
   [RFC2045] encoding of the octet string computed as per [RFC3447]
   section 8.1.1?, signature generation for the RSASSA-PKCS1-v1_5
   signature scheme. As specified in the EMSA-PKCS1-V1_5-ENCODE function
   in [RFC3447] section 9.2.1?, the value input to the signature
   function MUST contain a pre-pended algorithm object identifier for
   the hash function, but the availability of an ASN.1 parser and
   recognition of OIDs is not required of a signature verifier. The
   PKCS#1 v1.5 representation appears as:

        CRYPT (PAD (ASN.1 (OID, DIGEST (data))))

   Note that the padded ASN.1 will be of the following form:

        01 | FF* | 00 | prefix | hash

   Vertical bar ("|") represents concatenation. "01", "FF", and "00" are
   fixed octets of the corresponding hexadecimal value and the asterisk
   ("*") after "FF" indicates repetition. "hash" is the MD5 digest of
   the data. "prefix" is the ASN.1 BER MD5 algorithm designator prefix
   required in PKCS #1 [RFC3447], that is,

        hex 30 20 30 0c 06 08 2a 86 48 86 f7 0d 02 05 05 00 04 10

   This prefix is included to make it easier to use standard
   cryptographic libraries. The FF octet MUST be repeated enough times
   that the value of the quantity being CRYPTed is exactly one octet
   shorter than the RSA modulus.

   See [RFC6151] for MD5 security considerations.


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2.3.2 RSA-SHA256

   Identifier:
        http://www.w3.org/2001/04/xmldsig-more#rsa-sha256

   This implies the PKCS#1 v1.5 padding algorithm [RFC3447] as described
   in section 2.3.1 but with the ASN.1 BER SHA-256 algorithm designator
   prefix.  An example of use is

   <SignatureMethod
      Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256" />



2.3.3 RSA-SHA384

   Identifier:
        http://www.w3.org/2001/04/xmldsig-more#rsa-sha384

   This implies the PKCS#1 v1.5 padding algorithm [RFC3447] as described
   in section 2.3.1 but with the ASN.1 BER SHA-384 algorithm designator
   prefix.  An example of use is

   <SignatureMethod
      Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha384" />

   Because it takes about the same effort to calculate a SHA-384 message
   digest as it does a SHA-512 message digest, it is suggested that RSA-
   SHA512 be used in preference to RSA-SHA384 where possible.



2.3.4 RSA-SHA512

   Identifier:
        http://www.w3.org/2001/04/xmldsig-more#rsa-sha512

   This implies the PKCS#1 v1.5 padding algorithm [RFC3447] as described
   in section 2.3.1 but with the ASN.1 BER SHA-512 algorithm designator
   prefix.  An example of use is

   <SignatureMethod
      Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha512" />



2.3.5 RSA-RIPEMD160

   Identifier:
        http://www.w3.org/2001/04/xmldsig-more#rsa-ripemd160


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   This implies the PKCS#1 v1.5 padding algorithm [RFC3447] as described
   in section 2.3.1 but with the ASN.1 BER RIPEMD160 algorithm
   designator prefix.  An example of use is

   <SignatureMethod
      Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-ripemd160"
   />



2.3.6 ECDSA-SHA*, ECDSA-RIPEMD160, ECDSA-Whirlpool

   Identifiers:
        http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha1
        http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha224
        http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha256
        http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha384
        http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha512
        http://www.w3.org/2007/05/xmldsig-more#ecdsa-ripemd160
        http://www.w3.org/2007/05/xmldsig-more#ecdsa-whirlpool

   The Elliptic Curve Digital Signature Algorithm (ECDSA) [FIPS180-4] is
   the elliptic curve analogue of the DSA (DSS) signature method. It
   takes no explicit parameters. For detailed specifications of how to
   use it with SHA hash functions and XML Digital Signature, please see
   [X9.62] and [RFC4050].  The #ecdsa-ripemd160 and #ecdsa-whirlpool
   fragments in the new namespace identifies a signature method
   processed in the same way as specified by the #ecdsa-sha1 fragment of
   this namespace with the exception that RIPEMD160 or Whirlpool is used
   instead of SHA-1.

   The output of the ECDSA algorithm consists of a pair of integers
   usually referred by the pair (r, s).  The signature value consists of
   the base64 encoding of the concatenation of two octet-streams that
   respectively result from the octet-encoding of the values r and s in
   that order.  Integer to octet-stream conversion must be done
   according to the I2OSP operation defined in the [RFC3447]
   specification with the l parameter equal to the size of the base
   point order of the curve in bytes (e.g. 32 for the P-256 curve and 66
   for the P-521 curve [FIPS186-3]).

   For an introduction to elliptic curve cryptographic algorithms, see
   [RFC6090] but note that there is a Errata for that RFC.



2.3.7 ESIGN-SHA*





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   Identifiers:
        http://www.w3.org/2001/04/xmldsig-more#esign-sha1
        http://www.w3.org/2001/04/xmldsig-more#esign-sha224
        http://www.w3.org/2001/04/xmldsig-more#esign-sha256
        http://www.w3.org/2001/04/xmldsig-more#esign-sha384
        http://www.w3.org/2001/04/xmldsig-more#esign-sha512

   The ESIGN algorithm specified in [IEEE P1363a] is a signature scheme
   based on the integer factorization problem. It is much faster than
   previous digital signature schemes so ESIGN can be implemented on
   smart cards without special co-processors.

   An example of use is

   <SignatureMethod
      Algorithm="http://www.w3.org/2001/04/xmldsig-more#esign-sha1"
   />



2.3.8 RSA-Whirlpool

   Identifier:
        http://www.w3.org/2007/05/xmldsig-more#rsa-whirlpool

   As in the definition of the RSA-SHA1 algorithm in [XMLDSIG11], the
   designator "RSA" means the RSASSA-PKCS1-v1_5 algorithm as defined in
   PKCS2.1 [PKCS2.1].  When identified through the #rsa-whirlpool
   fragment identifier, Whirlpool is used as the hash algorithm instead.
   Use of the ASN.1 BER Whirlpool algorithm designator is implied. That
   designator is
        hex 30 4e 30 0a 06 06 28 cf 06 03 00 37 05 00 04 40
   as an explicit octet sequence. This corresponds to OID
   1.0.10118.3.0.55 defined in [10118-3].

   An example of use is

   <SignatureMethod
      Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-whirlpool"
   />



2.3.9 RSASSA-PSS With Parameters

   Identifiers:
        http://www.w3.org/2007/05/xmldsig-more#rsa-pss
        http://www.w3.org/2007/05/xmldsig-more#MGF1

   These identifiers imply the PKCS#1 EMSA-PSS encoding algorithm


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   [RFC3447].  The RSASSA-PSS algorithm takes the digest method (hash
   function), a mask generation function, the salt length in bytes
   (SaltLength), and the trailer field as explicit parameters.

   Algorithm identifiers for hash functions specified in XML encryption
   [XMLENC11], [XMLDSIG11], and in section 2.1 are considered to be
   valid algorithm identifiers for hash functions.  According to
   [RFC3447] the default value for the digest function is SHA-1, but due
   to the discovered weakness of SHA-1 [RFC6194] it is recommended that
   SHA-256 or a stronger hash function be used. Notwithstanding
   [RFC3447], SHA-256 is the default to be used with these
   SignatureMethod identifiers if no hash function has been specified.

   The default salt length for these SignatureMethod identifiers if the
   SaltLength is not specified SHALL be the number of octets in the hash
   value of the digest method, as recommended in [RFC4055]. In a
   parameterized RSASSA-PSS signature the ds:DigestMethod and the
   SaltLength parameters usually appear. If they do not, the defaults
   make this equivalent to http://www.w3.org/2007/05/xmldsig-
   more#sha256-rsa-MGF1 (see section 2.3.10). The TrailerField defaults
   to 1 (0xbc) when omitted.

   Schema Definition (target namespace
   http://www.w3.org/2007/05/xmldsig-more#):

      <xs:element name="RSAPSSParams" type="pss:RSAPSSParamsType">
          <xs:annotation>
              <xs:documentation>
      Top level element that can be used in xs:any namespace="#other"
      wildcard of ds:SignatureMethod content.
              </xs:documentation>
          </xs:annotation>
      </xs:element>
      <xs:complexType name="RSAPSSParamsType">
          <xs:sequence>
              <xs:element ref="ds:DigestMethod" minOccurs="0"/>
              <xs:element name="MaskGenerationFunction"
                 type="pss:MaskGenerationFunctionType" minOccurs="0"/>
              <xs:element name="SaltLength" type="xs:int"
                 minOccurs="0"/>
              <xs:element name="TrailerField" type="xs:int"
                 minOccurs="0"/>
          </xs:sequence>
      </xs:complexType>
      <xs:complexType name="MaskGenerationFunctionType">
          <xs:sequence>
              <xs:element ref="ds:DigestMethod" minOccurs="0"/>
          </xs:sequence>
          <xs:attribute name="Algorithm" type="xs:anyURI"
             default="http://www.w3.org/2007/05/xmldsig-more#MGF1"/>


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      </xs:complexType>



2.3.10 RSASSA-PSS Without Parameters

   [RFC3447] currently specifies only one mask generation function MGF1
   based on a hash function.  Whereas [RFC3447] allows for
   parameterization, the default is to use the same hash function as the
   digest method function.  Only this default approach is supported by
   this section, therefore the definition of a mask generation function
   type is not needed yet.  The same applies to the trailer field. There
   is only one value (0xBC) specified in [RFC3447].  Hence this default
   parameter must be used for signature generation. The default salt
   length is the length of the hash function.

   Identifiers:
        http://www.w3.org/2007/05/xmldsig-more#sha3-224-rsa-MGF1
        http://www.w3.org/2007/05/xmldsig-more#sha3-256-rsa-MGF1
        http://www.w3.org/2007/05/xmldsig-more#sha3-384-rsa-MGF1
        http://www.w3.org/2007/05/xmldsig-more#sha3-512-rsa-MGF1

        http://www.w3.org/2007/05/xmldsig-more#md2-rsa-MGF1
        http://www.w3.org/2007/05/xmldsig-more#md5-rsa-MGF1
        http://www.w3.org/2007/05/xmldsig-more#sha1-rsa-MGF1
        http://www.w3.org/2007/05/xmldsig-more#sha224-rsa-MGF1
        http://www.w3.org/2007/05/xmldsig-more#sha256-rsa-MGF1
        http://www.w3.org/2007/05/xmldsig-more#sha384-rsa-MGF1
        http://www.w3.org/2007/05/xmldsig-more#sha512-rsa-MGF1
        http://www.w3.org/2007/05/xmldsig-more#ripemd128-rsa-MGF1
        http://www.w3.org/2007/05/xmldsig-more#ripemd160-rsa-MGF1
        http://www.w3.org/2007/05/xmldsig-more#whirlpool-rsa-MGF1

   An example of use is

   <SignatureMethod
     Algorithm=
     "http://www.w3.org/2007/05/xmldsig-more#SHA3-256-rsa-MGF1"
   />



2.3.11 RSA-SHA224

   Identifier:
        http://www.w3.org/2007/05/xmldsig-more#rsa-sha224

   This implies the PKCS#1 v1.5 padding algorithm [RFC3447] as described
   in section 2.3.1 but with the ASN.1 BER SHA-224 algorithm designator
   prefix.  An example of use is


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   <SignatureMethod
      Algorithm="http://www.w3.org/2007/05/xmldsig-more#rsa-sha224" />

   Because it takes about the same effort to calculate a SHA-224 message
   digest as it does a SHA-256 message digest, it is suggested that RSA-
   SHA256 be used in preference to RSA-SHA224 where possible.



2.4 Minimal Canonicalization

   Thus far two independent interoperable implementations of Minimal
   Canonicalization have not been announced.  Therefore, when XML
   Digital Signature was advanced along the standards track from
   [RFC3075] to [RFC3275], Minimal Canonicalization was dropped.
   However, there is still interest.  For its definition, see [RFC3075]
   Section 6.5.1.

   For reference, its identifier remains:
        http://www.w3.org/2000/09/xmldsig#minimal



2.5 Transform Algorithms

   Note that all CanonicalizationMethod algorithms can also be used as
   Transform algorithms.



2.5.1 XPointer

   Identifier:
        http://www.w3.org/2001/04/xmldsig-more#xptr

   This transform algorithm takes an [XPointer] as an explicit
   parameter.  An example of use is:

   <Transform
      Algorithm="http://www.w3.org/2001/04/xmldsig-more/xptr">
      <XPointer
         xmlns="http://www.w3.org/2001/04/xmldsig-more/xptr">
            xpointer(id("foo")) xmlns(bar=http://foobar.example)
            xpointer(//bar:Zab[@Id="foo"])
      </XPointer>
   </Transform>

   Schema Definition:

        <element name="XPointer" type="string">


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   DTD:

        <!ELEMENT XPointer (#PCDATA) >

   Input to this transform is an octet stream (which is then parsed into
   XML).

   Output from this transform is a node set; the results of the XPointer
   are processed as defined in the XMLDSIG specification [RFC3275] for a
   same-document XPointer.



2.6 EncryptionMethod Algorithms

   This subsection gives identifiers and information for several
   EncryptionMethod Algorithms.



2.6.1 ARCFOUR Encryption Algorithm

   Identifier:
        http://www.w3.org/2001/04/xmldsig-more#arcfour

   ARCFOUR is a fast, simple stream encryption algorithm that is
   compatible with RSA Security's RC4 algorithm [RC4]. An example
   EncryptionMethod element using ARCFOUR is

   <EncryptionMethod
      Algorithm="http://www.w3.org/2001/04/xmldsig-more#arcfour">
      <KeySize>40<KeySize>
   </EncryptionMethod>

   Note that Arcfour makes use of the generic KeySize parameter
   specified and defined in [XMLENC11].



2.6.2 Camellia Block Encryption

   Identifiers:
        http://www.w3.org/2001/04/xmldsig-more#camellia128-cbc
        http://www.w3.org/2001/04/xmldsig-more#camellia192-cbc
        http://www.w3.org/2001/04/xmldsig-more#camellia256-cbc

   Camellia is a block cipher with the same interface as the AES
   [Camellia] [RFC3713], that is 128-bit block size and 128, 192, and
   256 bit key sizes. In XML Encryption Camellia is used in the same way
   as the AES: It is used in the Cipher Block Chaining (CBC) mode with a


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   128-bit initialization vector (IV). The resulting cipher text is
   prefixed by the IV. If included in XML output, it is then base64
   encoded. An example Camellia EncryptionMethod is as follows:

   <EncryptionMethod
      Algorithm=
      "http://www.w3.org/2001/04/xmldsig-more#camellia128-cbc"
   />



2.6.3 Camellia Key Wrap

   Identifiers:
        http://www.w3.org/2001/04/xmldsig-more#kw-camellia128
        http://www.w3.org/2001/04/xmldsig-more#kw-camellia192
        http://www.w3.org/2001/04/xmldsig-more#kw-camellia256

   Camellia [Camellia] [RFC3713] key wrap is identical to the AES key
   wrap algorithm [RFC3394] specified in the XML Encryption standard
   with "AES" replaced by "Camellia". As with AES key wrap, the check
   value is 0xA6A6A6A6A6A6A6A6.

   The algorithm is the same whatever the size of the Camellia key used
   in wrapping, called the key encrypting key or KEK. If Camellia is
   supported, it is particularly suggested that wrapping 128-bit keys
   with a 128-bit KEK and wrapping 256-bit keys with a 256-bit KEK be
   supported.

   An example of use is:

   <EncryptionMethod
      Algorithm=
      "http://www.w3.org/2001/04/xmldsig-more#kw-camellia128"
   />



2.6.4 PSEC-KEM

   Identifier:
        http://www.w3.org/2001/04/xmldsig-more#psec-kem

   The PSEC-KEM algorithm, specified in [18033-2], is a key
   encapsulation mechanism using elliptic curve encryption.

   An example of use is:





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   <EncryptionMethod
      Algorithm="http://www.w3.org/2001/04/xmlenc#psec-kem">
      <ECParameters>
         <Version>version</Version>
         <FieldID>id</FieldID>
         <Curve>curve</Curve>
         <Base>base</Base>
         <Order>order</Order>
         <Cofactor>cofactor</Cofactor>
      </ECParameters>
   </EncryptionMethod>

   See [18033-2] for information on the parameters above.



2.6.5 SEED Block Encryption

   Identifier:
        http://www.w3.org/2007/05/xmldsig-more#seed128-cbc

   SEED [RFC4269] is a 128-bit block size with 128-bit key sizes. In XML
   Encryption, SEED can be used in the Cipher Block Chaining (CBC) mode
   with a 128-bit initialization vector (IV). The resulting cipher text
   is prefixed by the IV. If included in XML output, it is then base64
   encoded.

   An example SEED EncryptionMethod is as follows:

   <EncryptionMethod
      Algorithm="http://www.w3.org/2007/05/xmldsig-more#seed128-cbc" />



2.6.6 SEED Key Wrap

   Identifier:
        http://www.w3.org/2007/05/xmldsig-more#kw-seed128

   Key wrapping with SEED is identical to Section 2.2.1 of [RFC3394]
   with "AES" replaced by "SEED". The algorithm is specified in
   [RFC4010].  The implementation of SEED is optional. The default
   initial value is 0xA6A6A6A6A6A6A6A6.

   An example of use is:

   <EncryptionMethod
      Algorithm=
      "http://www.w3.org/2007/05/xmldsig-more#kw-seed128"
   />


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3. KeyInfo

   In section 3.1 below a new KeyInfo element child is specified while
   in section 3.2 additional KeyInfo Type values for use in
   RetrievalMethod are specified.



3.1 PKCS #7 Bag of Certificates and CRLs

   A PKCS #7 [RFC2315] "signedData" can also be used as a bag of
   certificates and/or certificate revocation lists (CRLs).  The
   PKCS7signedData element is defined to accommodate such structures
   within KeyInfo.  The binary PKCS #7 structure is base64 [RFC2045]
   encoded.  Any signer information present is ignored.  The following
   is a example [RFC3092], eliding the base64 data:

   <foo:PKCS7signedData
      xmlns:foo="http://www.w3.org/2001/04/xmldsig-more">
      ...
   </foo:PKCS7signedData>



3.2 Additional RetrievalMethod Type Values

   The Type attribute of RetrievalMethod is an optional identifier for
   the type of data to be retrieved. The result of de-referencing a
   RetrievalMethod reference for all KeyInfo types with an XML structure
   is an XML element or document with that element as the root. The
   various "raw" key information types return a binary value. Thus they
   require a Type attribute because they are not unambiguously parsable.

   Identifiers:
        http://www.w3.org/2001/04/xmldsig-more#KeyName
        http://www.w3.org/2001/04/xmldsig-more#KeyValue
        http://www.w3.org/2001/04/xmldsig-more#PKCS7signedData
        http://www.w3.org/2001/04/xmldsig-more#rawPGPKeyPacket
        http://www.w3.org/2001/04/xmldsig-more#rawPKCS7signedData
        http://www.w3.org/2001/04/xmldsig-more#rawSPKISexp
        http://www.w3.org/2001/04/xmldsig-more#rawX509CRL
        http://www.w3.org/2001/04/xmldsig-more#RetrievalMethod










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4. Indexes

   The following subsections provide an index by URI and by fragment
   identifier (the portion of the URI after "#") of the algorithm and
   KeyInfo URIs defined in this document and in the standards (plus the
   one KeyInfo child element name defined in this document). The
   "Sec/Doc" column has the section of this document or, if not
   specified in this document, the standards document where the item is
   specified. See also [XMLSECXREF].



4.1 Fragment Index

   The initial "http://www.w3.org/" part of the URI is not included
   below. The first six entries have a null fragment identifier or no
   fragment identifier.

   Fragment            URI                                  Sec/Doc
   ---------           ----                                --------

                       2002/06/xmldsig-filter2               [XPATH]
                       2006/12/xmlc12n11#                  [CANON11]
                       TR/1999/REC-xslt-19991116              [XSLT]
                       TR/1999/REC-xpath-19991116            [XPATH]
                       TR/2001/06/xml-exc-c14n#             [XCANON]
                       TR/2001/REC-xml-c14n-20010315       [CANON10]
                       TR/2001/REC-xmlschema-1-20010502     [Schema]

   aes128-cbc          2001/04/xmlenc#aes128-cbc          [XMLENC11]
   aes128-gcm          2009/xmlenc11#aes128-gcm           [XMLENC11]
   aes192-cbc          2001/04/xmlenc#aes192-cbc          [XMLENC11]
   aes192-gcm          2009/xmlenc11#aes192-gcm           [XMLENC11]
   aes256-cbc          2001/04/xmlenc#aes256-cbc          [XMLENC11]
   aes256-gcm          2009/xmlenc11#aes256-gcm           [XMLENC11]
   arcfour             2001/04/xmldsig-more#arcfour           2.6.1

   base64              2000/09/xmldsig#base64              [RFC3275]

   camellia128-cbc     2001/04/xmldsig-more#camellia128-cbc   2.6.2
   camellia192-cbc     2001/04/xmldsig-more#camellia192-cbc   2.6.2
   camellia256-cbc     2001/04/xmldsig-more#camellia256-cbc   2.6.2
   ConcatKDF           2009/xmlenc11#ConcatKDF            [XMLENC11]

   decrypt#XML         2002/07/decrypt#XML                 [DECRYPT]
   decrypt#Binary      2002/07/decrypt#Binary              [DECRYPT]
   DEREncodedKeyValue  2009/xmldsig11#DEREncodedKeyValue [XMLDSIG11]
   dh                  2001/04/xmlenc#dh                  [XMLENC11]
   dh-es               2009/xmlenc11#dh-es                [XMLENC11]
   dsa-sha1            2000/09/xmldsig#dsa-sha1            [RFC3275]


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   dsa-sha256          2009/xmldsig11#dsa-sha256         [XMLDSIG11]
   DSAKeyValue         2000/09/xmldsig#DSAKeyValue       [XMLDSIG11]

   ECDH-ES             2009/xmlenc11#ECDH-ES              [XMLENC11]
   ecdsa-ripemd160     2007/05/xmldsig-more#ecdsa-ripemd160   2.3.6
   ecdsa-sha1          2001/04/xmldsig-more#ecdsa-sha1        2.3.6
   ecdsa-sha224        2001/04/xmldsig-more#ecdsa-sha224      2.3.6
   ecdsa-sha256        2001/04/xmldsig-more#ecdsa-sha256      2.3.6
   ecdsa-sha384        2001/04/xmldsig-more#ecdsa-sha384      2.3.6
   ecdsa-sha512        2001/04/xmldsig-more#ecdsa-sha512      2.3.6
   ecdsa-whirlpool     2007/05/xmldsig-more#ecdsa-whirlpool   2.3.5
   ecies-kem           2010/xmlsec-ghc#ecies-kem           [GENERIC]
   ECKeyValue          2009/xmldsig11#ECKeyValue         [XMLDSIG11]
   enveloped-signature 2000/09/xmldsig#enveloped-signature [RFC3275]
   esign-sha1          2001/04/xmldsig-more#esign-sha1        2.3.7
   esign-sha224        2001/04/xmldsig-more#esign-sha224      2.3.7
   esign-sha256        2001/04/xmldsig-more#esign-sha256      2.3.7
   esign-sha384        2001/04/xmldsig-more#esign-sha384      2.3.7
   esign-sha512        2001/04/xmldsig-more#esign-sha512      2.3.7

   generic-hybrid      2010/xmlsec-ghc#generic-hybrid      [GENERIC]

   hmac-md5            2001/04/xmldsig-more#hmac-md5          2.2.1
   hmac-ripemd160      2001/04/xmldsig-more#hmac-ripemd160    2.2.3
   hmac-sha1           2000/09/xmldsig#hmac-sha1           [RFC3275]
   hmac-sha224         2001/04/xmldsig-more#hmac-sha224       2.2.2
   hmac-sha256         2001/04/xmldsig-more#hmac-sha256       2.2.2
   hmac-sha384         2001/04/xmldsig-more#hmac-sha384       2.2.2
   hmac-sha512         2001/04/xmldsig-more#hmac-sha512       2.2.2

   KeyName             2001/04/xmldsig-more#KeyName           3.2
   KeyValue            2001/04/xmldsig-more#KeyValue          3.2
   kw-aes128           2001/04/xmlenc#kw-aes128           [XMLENC11]
   kw-aes128-pad       2009/xmlenc11#kw-aes-128-pad       [XMLENC11]
   kw-aes192           2001/04/xmlenc#kw-aes192           [XMLENC11]
   kw-aes192-pad       2009/xmlenc11#kw-aes-192-pad       [XMLENC11]
   kw-aes256           2001/04/xmlenc#kw-aes256           [XMLENC11]
   kw-aes256-pad       2009/xmlenc11#kw-aes-256-pad       [XMLENC11]
   kw-camellia128      2001/04/xmldsig-more#kw-camellia128    2.6.3
   kw-camellia192      2001/04/xmldsig-more#kw-camellia192    2.6.3
   kw-camellia256      2001/04/xmldsig-more#kw-camellia256    2.6.3
   kw-seed128          2007/05/xmldsig-more#kw-seed128        2.6.6

   md2-rsa-MGF1        2007/05/xmldsig-more#md2-rsa-MGF1      2.3.10
   md5                 2001/04/xmldsig-more#md5               2.1.1
   md5-rsa-MGF1        2007/05/xmldsig-more#md5-rsa-MGF1      2.3.10
   MGF1                2007/05/xmldsig-more#MGF1              2.3.9
   mgf1sha1            2009/xmlenc11#mgf1sha1             [XMLENC11]
   mgf1sha224          2009/xmlenc11#mgf1sha224           [XMLENC11]
   mgf1sha256          2009/xmlenc11#mgf1sha256           [XMLENC11]


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   mgf1sha384          2009/xmlenc11#mgf1sha384           [XMLENC11]
   mgf1sha512          2009/xmlenc11#mgf1sha512           [XMLENC11]
   MgmtData            2000/09/xmldsig#MgmtData          [XMLDSIG11]
   minimal             2000/09/xmldsig#minimal                2.4

   pbkdf2              2009/xmlenc11#pbkdf2               [XMLENC11]
   PGPData             2000/09/xmldsig#PGPData           [XMLDSIG11]
   PKCS7signedData     2001/04/xmldsig-more#PKCS7signedData   3.1
   PKCS7signedData     2001/04/xmldsig-more#PKCS7signedData   3.2
   psec-kem            2001/04/xmldsig-more#psec-kem          2.6.4

   rawPGPKeyPacket     2001/04/xmldsig-more#rawPGPKeyPacket   3.2
   rawPKCS7signedData  2001/04/xmldsig-more#rawPKCS7signedData 3.2
   rawSPKISexp         2001/04/xmldsig-more#rawSPKISexp       3.2
   rawX509Certificate  2000/09/xmldsig#rawX509Certificate  [RFC3275]
   rawX509CRL          2001/04/xmldsig-more#rawX509CRL        3.2
   RetrievalMethod     2001/04/xmldsig-more#RetrievalMethod   3.2
   ripemd128-rsa-MGF1  2007/05/xmldsig-more#ripemd128-rsa-MGF1
                                                              2.3.10
   ripemd160           2001/04/xmlenc#ripemd160           [XMLENC11]
   ripemd160-rsa-MGF1  2007/05/xmldsig-more#ripemd160-rsa-MGF1
                                                              2.3.10
   rsa-1_5             2001/04/xmlenc#rsa-1_5             [XMLENC11]
   rsa-md5             2001/04/xmldsig-more#rsa-md5           2.3.1
   rsa-oaep            2009/xmlenc11#rsa-oaep             [XMLENC11]
   rsa-oaep-mgf1p      2001/04/xmlenc#rsa-oaep-mgf1p      [XMLENC11]
   rsa-pss             2007/05/xmldsig-more#rsa-pss           2.3.9
   rsa-ripemd160       2001/04/xmldsig-more#rsa-ripemd160     2.3.5
   rsa-sha1            2000/09/xmldsig#rsa-sha1            [RFC3275]
   rsa-sha224          2007/05/xmldsig-more#rsa-sha224        2.3.11
   rsa-sha256          2001/04/xmldsig-more#rsa-sha256        2.3.2
   rsa-sha384          2001/04/xmldsig-more#rsa-sha384        2.3.3
   rsa-sha512          2001/04/xmldsig-more#rsa-sha512        2.3.4
   rsa-whirlpool       2007/05/xmldsig-more#rsa-whirlpool     2.3.5
   rsaes-kem           2010/xmlsec-ghc#rsaes-kem           [GENERIC]
   RSAKeyValue         2000/09/xmldsig#RSAKeyValue       [XMLDSIG11]

   seed128-cbc         2007/05/xmldsig-more#seed128-cbc       2.6.5
   sha1                2000/09/xmldsig#sha1                [RFC3275]
   sha1-rsa-MGF1       2007/05/xmldsig-more#sha1-rsa-MGF1     2.3.10
   sha224              2001/04/xmldsig-more#sha224            2.1.2
   sha224-rsa-MGF1     2007/05/xmldsig-more#sha224-rsa-MGF1   2.3.10
   sha256              2001/04/xmlenc#sha256              [XMLENC11]
   sha256-rsa-MGF1     2007/05/xmldsig-more#sha256-rsa-MGF1   2.3.10
   sha3-224            2007/05/xmldsig-more#sha3-224          2.1.5
   sha3-224-rsa-MGF1   2007/05/xmldsig-more#sha3-224-rsa-MGF1 2.3.10
   sha3-256            2007/05/xmldsig-more#sha3-256          2.1.5
   sha3-256-rsa-MGF1   2007/05/xmldsig-more#sha3-256-rsa-MGF1 2.3.10
   sha3-384            2007/05/xmldsig-more#sha3-384          2.1.5
   sha3-384-rsa-MGF1   2007/05/xmldsig-more#sha3-384-rsa-MGF1 2.3.10


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   sha3-512            2007/05/xmldsig-more#sha3-512          2.1.5
   sha3-512-rsa-MGF1   2007/05/xmldsig-more#sha3-512-rsa-MGF1 2.3.10
   sha384              2001/04/xmldsig-more#sha384            2.1.3
   sha384-rsa-MGF1     2007/05/xmldsig-more#sha384-rsa-MGF1   2.3.10
   sha512              2001/04/xmlenc#sha512              [XMLENC11]
   sha512-rsa-MGF1     2007/05/xmldsig-more#sha512-rsa-MGF1   2.3.10
   SPKIData            2000/09/xmldsig#SPKIData          [XMLDSIG11]

   tripledes-cbc       2001/04/xmlenc#tripledes-cbc       [XMLENC11]

   whirlpool           2007/05/xmldsig-more#whirlpool         2.1.4
   whirlpool-rsa-MGF1  2007/05/xmldsig-more#whirlpool-rsa-MGF1
                                                              2.3.10
   WithComments        2006/12/xmlc14n11#WithComments      [CANON11]
   WithComments        TR/2001/06/xml-exc-c14n#WithComments
                                                            [XCANON]
   WithComments        TR/2001/REC-xml-c14n-20010315#WithComments
                                                           [CANON10]

   X509Data            2000/09/xmldsig#X509Data          [XMLDSIG11]
   xptr                2001/04/xmldsig-more#xptr              2.5.1

   The initial "http://www.w3.org/" part of the URI is not included
   above.



4.2 URI Index

   The initial "http://www.w3.org/" part of the URI is not included
   below.

   URI                                 Sec/Doc   Type
   ----                                --------  -----

   2000/09/xmldsig#base64              [RFC3275]  Transform
   2000/09/xmldsig#DSAKeyValue         [RFC3275]  Retrieval type
   2000/09/xmldsig#dsa-sha1            [RFC3275]  SignatureMethod
   2000/09/xmldsig#enveloped-signature [RFC3275]  Transform
   2000/09/xmldsig#hmac-sha1           [RFC3275]  SignatureMethod
   2000/09/xmldsig#MgmtData            [RFC3275]  Retrieval type
   2000/09/xmldsig#minimal                2.4     Canonicalization
   2000/09/xmldsig#PGPData             [RFC3275]  Retrieval type
   2000/09/xmldsig#rawX509Certificate  [RFC3275]  Retrieval type
   2000/09/xmldsig#rsa-sha1            [RFC3275]  SignatureMethod
   2000/09/xmldsig#RSAKeyValue         [RFC3275]  Retrieval type
   2000/09/xmldsig#sha1                [RFC3275]  DigestAlgorithm
   2000/09/xmldsig#SPKIData            [RFC3275]  Retrieval type
   2000/09/xmldsig#X509Data            [RFC3275]  Retrieval type



D. Eastlake 3rd                                                [Page 24]

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   2001/04/xmldsig-more#arcfour           2.6.1   EncryptionMethod
   2001/04/xmldsig-more#camellia128-cbc   2.6.2   EncryptionMethod
   2001/04/xmldsig-more#camellia192-cbc   2.6.2   EncryptionMethod
   2001/04/xmldsig-more#camellia256-cbc   2.6.2   EncryptionMethod
   2001/04/xmldsig-more#ecdsa-sha1        2.3.6   SignatureMethod
   2001/04/xmldsig-more#ecdsa-sha224      2.3.6   SignatureMethod
   2001/04/xmldsig-more#ecdsa-sha256      2.3.6   SignatureMethod
   2001/04/xmldsig-more#ecdsa-sha384      2.3.6   SignatureMethod
   2001/04/xmldsig-more#ecdsa-sha512      2.3.6   SignatureMethod
   2001/04/xmldsig-more#esign-sha1        2.3.7   SignatureMethod
   2001/04/xmldsig-more#esign-sha224      2.3.7   SignatureMethod
   2001/04/xmldsig-more#esign-sha256      2.3.7   SignatureMethod
   2001/04/xmldsig-more#esign-sha384      2.3.7   SignatureMethod
   2001/04/xmldsig-more#esign-sha512      2.3.7   SignatureMethod
   2001/04/xmldsig-more#hmac-md5          2.2.1   SignatureMethod
   2001/04/xmldsig-more#hmac-ripemd160    2.2.3   SignatureMethod
   2001/04/xmldsig-more#hmac-sha224       2.2.2   SignatureMethod
   2001/04/xmldsig-more#hmac-sha256       2.2.2   SignatureMethod
   2001/04/xmldsig-more#hmac-sha384       2.2.2   SignatureMethod
   2001/04/xmldsig-more#hmac-sha512       2.2.2   SignatureMethod
   2001/04/xmldsig-more#KeyName           3.2     Retrieval type
   2001/04/xmldsig-more#KeyValue          3.2     Retrieval type
   2001/04/xmldsig-more#kw-camellia128    2.6.3   EncryptionMethod
   2001/04/xmldsig-more#kw-camellia192    2.6.3   EncryptionMethod
   2001/04/xmldsig-more#kw-camellia256    2.6.3   EncryptionMethod
   2001/04/xmldsig-more#md5               2.1.1   DigestAlgorithm
   2001/04/xmldsig-more#PKCS7signedData   3.2     Retrieval type
   2001/04/xmldsig-more#psec-kem          2.6.4   EncryptionMethod
   2001/04/xmldsig-more#rawPGPKeyPacket   3.2     Retrieval type
   2001/04/xmldsig-more#rawPKCS7signedData 3.2    Retrieval type
   2001/04/xmldsig-more#rawSPKISexp       3.2     Retrieval type
   2001/04/xmldsig-more#rawX509CRL        3.2     Retrieval type
   2001/04/xmldsig-more#RetrievalMethod   3.2     Retrieval type
   2001/04/xmldsig-more#rsa-md5           2.3.1   SignatureMethod
   2001/04/xmldsig-more#rsa-sha256        2.3.2   SignatureMethod
   2001/04/xmldsig-more#rsa-sha384        2.3.3   SignatureMethod
   2001/04/xmldsig-more#rsa-sha512        2.3.4   SignatureMethod
   2001/04/xmldsig-more#rsa-ripemd160     2.3.5   SignatureMethod
   2001/04/xmldsig-more#sha224            2.1.2   DigestAlgorithm
   2001/04/xmldsig-more#sha384            2.1.3   DigestAlgorithm
   2001/04/xmldsig-more#xptr              2.5.1   Transform
   2001/04/xmldsig-more#PKCS7signedData   3.1     KeyInfo child

   2001/04/xmlenc#aes128-cbc          [XMLENC11]  EncryptionMethod
   2001/04/xmlenc#aes192-cbc          [XMLENC11]  EncryptionMethod
   2001/04/xmlenc#aes256-cbc          [XMLENC11]  EncryptionMethod
   2001/04/xmlenc#dh                  [XMLENC11]  AgreementMethod
   2001/04/xmlenc#kw-aes128           [XMLENC11]  EncryptionMethod
   2001/04/xmlenc#kw-aes192           [XMLENC11]  EncryptionMethod
   2001/04/xmlenc#kw-aes256           [XMLENC11]  EncryptionMethod


D. Eastlake 3rd                                                [Page 25]

INTERNET-DRAFT                              Additional XML Security URIs


   2001/04/xmlenc#ripemd160           [XMLENC11]  DigestAlgorithm
   2001/04/xmlenc#rsa-1_5             [XMLENC11]  EncryptionMethod
   2001/04/xmlenc#rsa-oaep-mgf1p      [XMLENC11]  EncryptionMethod
   2001/04/xmlenc#sha256              [XMLENC11]  DigestAlgorithm
   2001/04/xmlenc#sha512              [XMLENC11]  DigestAlgorithm
   2001/04/xmlenc#tripledes-cbc       [XMLENC11]  EncryptionMethod

   2002/06/xmldsig-filter2               [XPATH]  Transform

   2002/07/decrypt#XML                 [DECRYPT]  Transform
   2002/07/decrypt#Binary              [DECRYPT]  Transform

   2006/12/xmlc12n11#                  [CANON11]  Canonicalization
   2006/12/xmlc14n11#WithComments      [CANON11]  Canonicalization

   2007/05/xmldsig-more#ecdsa-ripemd160   2.3.6   SignatureMethod
   2007/05/xmldsig-more#ecdsa-whirlpool   2.3.5   SignatureMethod
   2007/05/xmldsig-more#kw-seed128        2.6.6   EncryptionMethod
   2007/05/xmldsig-more#md2-rsa-MGF1      2.3.10  SignatureMethod
   2007/05/xmldsig-more#md5-rsa-MGF1      2.3.10  SignatureMethod
   2007/05/xmldsig-more#MGF1              2.3.9   SignatureMethod
   2007/05/xmldsig-more#ripemd128-rsa-MGF1 2.3.10 SignatureMethod
   2007/05/xmldsig-more#ripemd160-rsa-MGF1 2.3.10 SignatureMethod
   2007/05/xmldsig-more#rsa-pss           2.3.9   SignatureMethod
   2007/05/xmldsig-more#rsa-sha224        2.3.11  SignatureMethod
   2007/05/xmldsig-more#rsa-whirlpool     2.3.5   SignatureMethod
   2007/05/xmldsig-more#seed128-cbc       2.6.5   EncryptionMethod
   2007/05/xmldsig-more#sha1-rsa-MGF1     2.3.10  SignatureMethod
   2007/05/xmldsig-more#sha224-rsa-MGF1   2.3.10  SignatureMethod
   2007/05/xmldsig-more#sha256-rsa-MGF1   2.3.10  SignatureMethod
   2007/05/xmldsig-more#sha3-224          2.1.5   DigestAlgorithm
   2007/05/xmldsig-more#sha3-224-rsa-MGF1 2.3.10  SignatureMethod
   2007/05/xmldsig-more#sha3-256          2.1.5   DigestAlgorithm
   2007/05/xmldsig-more#sha3-256-rsa-MGF1 2.3.10  SignatureMethod
   2007/05/xmldsig-more#sha3-384          2.1.5   DigestAlgorithm
   2007/05/xmldsig-more#sha3-384-rsa-MGF1 2.3.10  SignatureMethod
   2007/05/xmldsig-more#sha3-512          2.1.5   DigestAlgorithm
   2007/05/xmldsig-more#sha3-512-rsa-MGF1 2.3.10  SignatureMethod
   2007/05/xmldsig-more#sha384-rsa-MGF1   2.3.10  SignatureMethod
   2007/05/xmldsig-more#sha512-rsa-MGF1   2.3.10  SignatureMethod
   2007/05/xmldsig-more#whirlpool         2.1.4   DigestAlgorithm
   2007/05/xmldsig-more#whirlpool-rsa-MGF1 2.3.10 SignatureMethod
   2009/xmlenc11#kw-aes-128-pad       [XMLENC11]  EncryptionMethod
   2009/xmlenc11#kw-aes-192-pad       [XMLENC11]  EncryptionMethod
   2009/xmlenc11#kw-aes-256-pad       [XMLENC11]  EncryptionMethod

   2009/xmldsig11#dsa-sha256         [XMLDSIG11]  SignatureMethod
   2009/xmldsig11#ECKeyValue         [XMLDSIG11]  Retrieval type
   2009/xmldsig11#DEREncodedKeyValue [XMLDSIG11]  Retrieval type



D. Eastlake 3rd                                                [Page 26]

INTERNET-DRAFT                              Additional XML Security URIs


   2009/xmlenc11#aes128-gcm           [XMLENC11]  EncryptionMethod
   2009/xmlenc11#aes192-gcm           [XMLENC11]  EncryptionMethod
   2009/xmlenc11#aes256-gcm           [XMLENC11]  EncryptionMethod
   2009/xmlenc11#ConcatKDF            [XMLENC11]  EncryptionMethod
   2009/xmlenc11#mgf1sha1             [XMLENC11]  SignatureMethod
   2009/xmlenc11#mgf1sha224           [XMLENC11]  SignatureMethod
   2009/xmlenc11#mgf1sha256           [XMLENC11]  SignatureMethod
   2009/xmlenc11#mgf1sha384           [XMLENC11]  SignatureMethod
   2009/xmlenc11#mgf1sha512           [XMLENC11]  SignatureMethod
   2009/xmlenc11#pbkdf2               [XMLENC11]  EncryptionMethod
   2009/xmlenc11#rsa-oaep             [XMLENC11]  EncryptionMethod
   2009/xmlenc11#ECDH-ES              [XMLENC11]  EncryptionMethod
   2009/xmlenc11#dh-es                [XMLENC11]  EncryptionMethod

   2010/xmlsec-ghc#generic-hybrid      [GENERIC]  Generic Hybrid
   2010/xmlsec-ghc#rsaes-kem           [GENERIC]  Generic Hybrid
   2010/xmlsec-ghc#ecies-kem           [GENERIC]  Generic Hybrid

   TR/1999/REC-xpath-19991116            [XPATH]  Transform
   TR/1999/REC-xslt-19991116              [XSLT]  Transform
   TR/2001/06/xml-exc-c14n#             [XCANON]  Canonicalization
   TR/2001/06/xml-exc-c14n#WithComments
                                        [XCANON]  Canonicalization
   TR/2001/REC-xml-c14n-20010315       [CANON10]  Canonicalization
   TR/2001/REC-xml-c14n-20010315#WithComments
                                       [CANON10]  Canonicalization
   TR/2001/REC-xmlschema-1-20010502     [Schema]  Transform

   The initial "http://www.w3.org/" part of the URI is not included
   above.






















D. Eastlake 3rd                                                [Page 27]

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5. Allocation Considerations

   W3C and IANA allocation considerations are given below.



5.1 W3C Allocation Considerations

   As it is easy for people to construct their own unique URIs [RFC3986]
   and, if appropriate, to obtain a URI from the W3C, it is not intended
   that any additional "http://www.w3.org/2007/05/xmldsig-more#" URIs be
   created beyond those enumerated in this RFC. (W3C Namespace stability
   rules prohibit the creation of new URIs under
   "http://www.w3.org/2000/09/xmldsig#" and URIs under
   "http://www.w3.org/2001/04/xmldsig-more#" were frozen with the
   publication of [RFC4051].)

   An "xmldsig-more" URI does not imply any official W3C or IETF status
   for these algorithms or identifiers nor does it imply that they are
   only useful in digital signatures.  Currently, dereferencing such
   URIs may or may not produce a temporary placeholder document.
   Permission to use these URI prefixes has been given by the W3C.



5.1 IANA Considerations

   IANA will establish a Registry for "XML Security URIs" with that name
   suggested for the Registry. The initial contents will correspond to
   Section 4.2 of this document with the numeric section references in
   the "Sec/Doc" column augmented with references to this RFC (as, for
   example, "[RFCxxxx], Section 2.6.4").

   New entries, including new Types, will be added based on Expert
   Review [RFC5226]. Criterion for inclusion are (1) documention
   sufficient for interoperability of the algorithm or data type and the
   XML syntax for its represetation and use and (2) sufficient
   importance as normally indicated by inclusion in (2a) an approved W3C
   Note, Proposed Recommendation, or Recommendation or (2b) an approved
   IETF standards track document. Typically, the Registry will reference
   a W3C or IETF document specifying such XML syntax which document in
   turn references a more abstract description of the algorithm or data
   type.









D. Eastlake 3rd                                                [Page 28]

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6. Security Considerations

   This RFC is concerned with documenting the URIs that designate
   algorithms and some data types used in connection with XML security.
   The security considerations vary widely with the particular
   algorithms and the general security considerations for XML security
   are outside of the scope of this document but appear in [XMLDSIG11],
   [XMLENC11], [CANON10], [CANON11], and [GENERIC].

   [RFC6151] should be consulted before considering the use of MD5 as a
   DigestMethod or RSA-MD5 as a SignatureMethod.

   See [RFC6194] for SHA-1 Security Considerations and [RFC6151] for MD5
   Security Considerations.

   Additional security considerations are given in connection with the
   description of some algorithms in the body of this document.

   Implementers should be aware that cryptographic algorithms become
   weaker with time.  As new cryptoanalysis techniques are developed and
   computing performance improves, the work factor to break a particular
   cryptographic algorithm will reduce.  Therefore, cryptographic
   implementations should be modular allowing new algorithms to be
   readily inserted.  That is, implementers should be prepared for the
   set of mandatory to implement algorithms to change over time.



























D. Eastlake 3rd                                                [Page 29]

INTERNET-DRAFT                              Additional XML Security URIs


Acknowledgements

   The contributions of the following to this document, listed in
   alphabetic order, are gratefully acknowledged: Benoit Claise, Adrian
   Farrel, Stephen Farrell, Ernst Giessmann, Frederick Hirsch, Bjoern
   Hoehrmann, Russ Housley, Satoru Kanno, Charlie Kaufman, Konrad Lanz,
   Barry Leiba, Subramanian Moonesamy, Peter Lipp, HwanJin Lee, Thomas
   Roessler, Hanseong Ryu, Peter Saint-Andre, and Sean Turner.

   The following contributors to [RFC4051], on which this document is
   based, are gratefully acknowledged: Glenn Adams, Merlin Hughs, Gregor
   Karlinger, Brian LaMachia, Shiho Moriai, Joseph Reagle, Russ Housley,
   and Joel Halpern.

   The document was prepared in raw nroff. All macros used were defined
   within the source file.




































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Appendix A: Changes from RFC 4051

   The following changes have been made in RFC 4051 to produce this
   document.

    1. Update and add numerous RFC, W3C, and Internet-Draft references.

    2. Add #ecdsa-ripemd160, #whirlpool, #ecdsa-whirlpool, #rsa-
       whirlpool, #seed128-cbc, and #kw-seed128.

    3. Incorporate RFC 4051 errata [Errata191].

    4. Add URI and fragment index sections.

    4. In reference to MD5 and SHA-1, add references to [RFC6151] and
       [RFC6194].

    5. Add SHA-3 / Keccak placeholder section including #sha3-224,
       #sha3-256, #sha3-384, and #sha3-512.

    6. Add RSASSA-PSS sections including #sha3-224-MGF1, #sha3-256-MGF1,
       #sha3-384-MGF1, #sha3-512-MGF1, #md2-rsa-MGF1, #md5-rsa-MGF1,
       #sha1-rsa-MGF1, #sha224-rsa-MGF1, #sha256-rsa-MGF1, #sha384-rsa-
       MGF1, #sha512-rsa-MGF1, #ripemd128-rsa-MGF1, #ripemd160-rsa-MGF1,
       and #whirlpool-rsa-MGF1.

    7. Add new URIs from Canonical XML 1.1 and XML Encryption 1.1
       including: #aes128-gcm, #aes192-gcm, #aes256-gc, #ConcatKDF,
       #pbkdf, #rsa-oaep, #ECDH-ES, and #dh-es.

    8. Add padded AES key wrap from [RFC5649].

    9. Add acronym subsection.

   10. Add numerous URIs that are specified in W3C XML Security
       documents to the Indexes. These do not have sections in the body
       of this document. For example those for dsa-sha256, mgf1sha*,
       decrypt#XML, and xmldsig-filter2.

   11. Establish IANA Registry.

   12. Editorial changes.










D. Eastlake 3rd                                                [Page 31]

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Appendix Z: Change History

   RFC Editor Note: Plese delete this Appendix before publication.

From -02 to -03

   Fix typos and add Whirlpool designator. Add Ernst Giessmann to
   Acknowledgements.

From -03 to -04

   1. Add identifiers and space holders for SHA-3 / Keccak.

   2. Add Sections 2.3.9 and 2.3.10 for RSASSA-PSS.

   3. Update URI index according to items 1 and 2 above.

   3. Add new URIs from Canonical XML 1.1 and XML Encryption 1.1.

   4. Fix typos, fill in a few minor missing values.

   5. Minor editorial changes.

From -04 to -05

   1. Add padded AES key wrap from [RFC5649].

   2. Add a section on SHA-256 and SHA-512.

   3. Minor editorial change to Abstract and various typo fixes.

From -05 to -06

   1. Add fragment index.

   2. Fix typo.

From -06 to -07

   1. Update for publication of XML Signature 1.1, XML Encryption 1.1,
   Proposed Recommendations.

   2. Editorial changes.

From -07 to -08

   1. Delete Appendix B which had information on SEED irrelevant to this
   document.

   2. Update XPointer Language reference.


D. Eastlake 3rd                                                [Page 32]

INTERNET-DRAFT                              Additional XML Security URIs


   3. Remove claim in 1.1 that this document is Informational.

   4. At beginning of Section 2, clarify namespaces used.

   5. Add numerous URIs that are specified in W3C XML Security document
   to the Indexes. These do not have sections in the body of this
   document. For example those for dsa-sha256, mgf1sha*, decrypt#XML,
   and xmldsig-filter2.

   6. Editorial changes.

From -08 to -09

   1. Change from www.w3.org/2007/05/xmldsig-more URIs to
   www.w3.org/2009/xmlenc11 URIs for AES key wrap with padding. Delete
   Section 2.6.7 on those algorithms, since they are covered in
   [XMLENC].

   2. Add references to "XML Signature Properties" and "XML Security
   Algorithm Cross-Reference".

   3. Move Errata reference to Informational Referecnes.

   4. Split Section 5 into IANA and W3C considerations, move one
   relevant paragraph down to Section 5 from the first part of Section
   2.

From -09 to -10

   Lots of editorial changes from IESG review including elimination of
   any implication that listing an algorithm here implies endorsement
   and any implication that this document changes implementation
   requirements. Add establishment of IANA Registry.



















D. Eastlake 3rd                                                [Page 33]

INTERNET-DRAFT                              Additional XML Security URIs


Normative References

   [10118-3] - "Information technology -- Security techniques -- Hash-
         functions -- Part 3: Dedicated hash-functions", ISO/IEC
         10118-3, 2004.

   [18033-2] - "Information technology -- Security techniques --
         Encryption algorithms -- Part 3: Asymmetric ciphers", ISO/IEC
         18033-2, 2010.

   [Camellia] - "Camellia: A 128-bit Block Cipher Suitable for Multiple
         Platforms - Design and Analysis -", K. Aoki, T. Ichikawa, M.
         Matsui, S. Moriai, J. Nakajima, T. Tokita, In Selected Areas in
         Cryptography, 7th Annual International Workshop, SAC 2000,
         August 2000, Proceedings, Lecture Notes in Computer Science
         2012, pp. 39-56, Springer-Verlag, 2001.

   [FIPS180-4] - "Secure Hash Standard (SHS)", United States of
         American, National Institute of Science and Technology, Federal
         Information Processing Standard (FIPS) 180-4, March 2012,
         http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf

   [FIPS186-3] - "Digital Signature Standard (DSS)", United States of
         America, National Institute of Standards and Technology,
         Federal Information Processing Standard (FIPS) 186-3, June
         2009,
         http://csrc.nist.gov/publications/fips/fips186-3/fips_186-3.pdf

   [IEEE P1363a] - "Standard Specifications for Public Key Cryptography:
         Additional Techniques", October 2002.

   [RC4] - Schneier, B., "Applied Cryptography: Protocols, Algorithms,
         and Source Code in C", Second Edition, John Wiley and Sons, New
         York, NY, 1996.

   [RFC1321] - Rivest, R., "The MD5 Message-Digest Algorithm", RFC 1321,
         April 1992.

   [RFC2045] - Freed, N. and N. Borenstein, "Multipurpose Internet Mail
         Extensions (MIME) Part One: Format of Internet Message Bodies",
         RFC 2045, November 1996.

   [RFC2104] - Krawczyk, H., Bellare, M., and R. Canetti, "HMAC: Keyed-
         Hashing for Message Authentication", RFC 2104, February 1997.

   [RFC2119] - Bradner, S., "Key words for use in RFCs to Indicate
         Requirement Levels", BCP 14, RFC 2119, March 1997.

   [RFC2315] - Kaliski, B., "PKCS #7: Cryptographic Message Syntax
         Version 1.5", RFC 2315, March 1998.


D. Eastlake 3rd                                                [Page 34]

INTERNET-DRAFT                              Additional XML Security URIs


   [RFC3275] - Eastlake 3rd, D., Reagle, J., and D. Solo, "(Extensible
         Markup Language) XML-Signature Syntax and Processing", RFC
         3275, March 2002.

   [RFC3394] - Schaad, J. and R. Housley, "Advanced Encryption Standard
         (AES) Key Wrap Algorithm", RFC 3394, September 2002.

   [RFC3447] - Jonsson, J. and B. Kaliski, "Public-Key Cryptography
         Standards (PKCS) #1: RSA Cryptography Specifications Version
         2.1", RFC 3447, February 2003.

   [RFC3713] - Matsui, M., Nakajima, J., and S. Moriai, "A Description
         of the Camellia Encryption Algorithm", RFC 3713, April 2004.

   [RFC3986] - Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform
         Resource Identifier (URI): Generic Syntax", STD 66, RFC 3986,
         January 2005.

   [RFC4050] - Blake-Wilson, S., Karlinger, G., Kobayashi, T., and Y.
         Wang, "Using the Elliptic Curve Signature Algorithm (ECDSA) for
         XML Digital Signatures", RFC 4050, April 2005.

   [RFC4055] - Schaad, J., Kaliski, B., and R. Housley, "Additional
         Algorithms and Identifiers for RSA Cryptography for use in the
         Internet X.509 Public Key Infrastructure Certificate and
         Certificate Revocation List (CRL) Profile", RFC 4055, June
         2005.

   [RFC4269] - Lee, H., Lee, S., Yoon, J., Cheon, D., and J. Lee, "The
         SEED Encryption Algorithm", RFC 4269, December 2005.

   [RFC5226] - Narten, T. and H. Alvestrand, "Guidelines for Writing an
         IANA Considerations Section in RFCs", BCP 26, RFC 5226, May
         2008.

   [RFC6234] - Eastlake 3rd, D. and T. Hansen, "US Secure Hash
         Algorithms (SHA and SHA-based HMAC and HKDF)", RFC 6234, May
         2011.

   [RIPEMD-160] - ISO/IEC 10118-3:1998, "Information Technology -
         Security techniques - Hash-functions - Part3: Dedicated hash-
         functions", ISO, 1998.

   [X9.62] - X9.62-200X, "Public Key Cryptography for the Financial
         Services Industry: The Elliptic Curve Digital Signature
         Algorithm (ECDSA)", Accredited Standards Committee X9, American
         National Standards Institute.

   [XMLENC10] - "XML Encryption Syntax and Processing", J. Reagle, D.
         Eastlake, W3C Recommendation 10 December 2002,


D. Eastlake 3rd                                                [Page 35]

INTERNET-DRAFT                              Additional XML Security URIs


         http://www.w3.org/TR/2002/REC-xmlenc-core-20021210/

   [XMLENC11] - "XML Encryption Syntax and Processing Version 1.1", D.
         Eastlake, J. Reagle, F. Hirsch, T. Roessler, Proposed
         Recommendation 24 January 2013, http://www.w3.org/TR/2013/PR-
         xmlenc-core1-20130124/

   [XPointer] - "XML Pointer Language (XPointer) Version 1.0", W3C
         working draft, Steve DeRose, Eve Maler, Ron Daniel Jr., Paul
         Grosso, Jonathan Marsh, Norman Walsh, August 2002.
         http://www.w3.org/TR/2002/WD-xptr-20020816/









































D. Eastlake 3rd                                                [Page 36]

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Informational References

   [CANON10] - John Boyer.  "Canonical XML Version 1.0", 15 March 2001,
         http://www.w3.org/TR/2001/REC-xml-c14n-20010315

   [CANON11] - John Boyer, Glenn Marcy, "Canoncial XML Version 1.1", 2
         May 2008, http://www.w3.org/TR/2008/REC-xml-c14n11-20080502/

   [DECRYPT] - Merlin Hughes, Takeshi Imamura, Hiroshi Maruyama,
         "Decryption Transform for XML Signature", 10 Decmeber 2002.
         http://www.w3.org/TR/2002/REC-xmlenc-decrypt-20021210

   [Errata191] - RFC Errata, Errata ID 191, RFC 4051, http://www.rfc-
         editor.org

   [GENERIC] - Magnus Nystrom, Frederick Hirsch, "XML Security Generic
         Hybrid Ciphers", 24 January 2013,
         http://www.w3.org/TR/2013/NOTE-xmlsec-generic-hybrid-20130124/

   [Keccak]
         http://csrc.nist.gov/groups/ST/hash/sha-3/winner_sha-3.html
         http://keccak.noekeon.org

   [RFC3075] - Eastlake 3rd, D., Reagle, J., and D. Solo, "XML-Signature
         Syntax and Processing", RFC 3075, March 2001.

   [RFC3076] - Boyer, J., "Canonical XML Version 1.0", RFC 3076, March
         2001.

   [RFC3092] - Eastlake 3rd, D., Manros, C., and E. Raymond, "Etymology
         of "Foo"", RFC 3092, April 1 2001.

   [RFC3741] - Boyer, J., Eastlake 3rd, D., and J. Reagle, "Exclusive
         XML Canonicalization, Version 1.0", RFC 3741, March 2004.

   [RFC4010] - Park, J., Lee, S., Kim, J., and J. Lee, "Use of the SEED
         Encryption Algorithm in Cryptographic Message Syntax (CMS)",
         RFC 4010, February 2005.

   [RFC4051] - Eastlake 3rd, D., "Additional XML Security Uniform
         Resource Identifiers (URIs)", RFC 4051, April 2005.

   [RFC6090]
         - D. McGrew, K. Igoe, M. Salter, "Fundamental Elliptic Curve
         Cryptography Algorithms", RFC 6090, February 2011.
         - Note RFC Errata numbers 2773, 2774, 2775, 2776, and 2777.

   [RFC6151] - Turner, S. and L. Chen, "Updated Security Considerations
         for the MD5 Message-Digest and the HMAC-MD5 Algorithms", RFC
         6151, March 2011.


D. Eastlake 3rd                                                [Page 37]

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   [RFC6194] - Polk, T., Chen, L., Turner, S., and P. Hoffman, "Security
         Considerations for the SHA-0 and SHA-1 Message-Digest
         Algorithms", RFC 6194, March 2011.

   [Schema] - "XML Schema Part 1: Structures Second Edition", H.
         Thompson, D. Beech, M. Maloney, N. Mendelsohn, W3C
         Recommendation 28 October 2004, http://www.w3.org/TR/2004/REC-
         xmlschema-1-20041028/
         - "XML Schema Part 2: Datatypes Second Edition", P. Biron, A.
         Malhotra, W3C Recommendation 28 October 2004,
         http://www.w3.org/TR/2004/REC-xmlschema-2-20041028/

   [W3C] - World Wide Web Consortium, <http://www.w3.org>.

   [XCANON] - "Exclusive XML Canonicalization Version 1.0", D.
         Eastlake, J. Reagle, 18 July 2002.
         http://www.w3.org/TR/2002/REC-xml-exc-c14n-20020718/

   [XMLDSIG10] - "XML Signature Syntax and Processing (Second Edition)",
         D. Eastlake, J. Reagle, D. Solo, F. Hirsch, T. Roessler, W3C
         Recommendation 10 June 2008, http://www.w3.org/TR/2008/REC-
         xmldsig-core-20080610/

   [XMLDSIG11] - "XML Signature Syntax and Processing Version 1.1", D.
         Eastlake, J. Reagle, D. Solo, F. Hirsch, M. Nystrom, T.
         Roessler, K. Yiu, Proposed Recommendation 24 January 2013,
         http://www.w3.org/TR/2013/PR-xmldsig-core1-20130124/

   [XMLDSIG-PROP] - "XML Signature Properties", F. Hirsch, Proposed
         Recommendation 24 January 2013, http://www.w3.org/TR/2013/PR-
         xmldsig-properties-20130124/

   [XMLSECXREF] - "XML Security Algorithm Cross-Reference", F. Hirsch,
         T. Roessler, K. Yiu, Working Group Note 24 January 2013,
         http://www.w3.org/TR/2013/NOTE-xmlsec-algorithms-20130124/

   [XPATH] - "XML-Signature XPath Filter 2.0", J. Boyer, M. Huges, J.
         Reagle, 8 November 2002.  http://www.w3.org/TR/2002/REC-
         xmldsig-filter2-20021108/
         - "XML Path Language (XPath) 2.0 (Second Edition)", A.
         Berglund, S. Boag, D. Chamberlin, M. Fernandez, M. Kay, J.
         Robie, J. Simeon, W3C Recommendation 14 December 2010,
         http://www.w3.org/TR/2010/REC-xpath20-20101214/

   [XSLT] - "XSL Transformations (XSLT) Version 2.0", M. Saxonica, W3C
         Recommendation 23 January 2007, http://www.w3.org/TR/2007/REC-
         xslt20-20070123/





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Author's Address

   Donald E. Eastlake, 3rd
   Huawei Technologies
   155 Beaver Street
   Milford, MA 01757 USA

   Telephone:   +1-508-333-2270
   EMail:       d3e3e3@gmail.com











































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D. Eastlake 3rd                                                [Page 40]


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