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Versions: 00 01 02 03 04
- G. Chudov, Ed.
Internet-Draft S. Leontiev, Ed.
Intended status: Informational CRYPTO-PRO
Expires: June 11, 2009 December 8, 2008
GOST 28147-89 Cipher Suites for Transport Layer Security (TLS)
draft-chudov-cryptopro-cptls-04
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Abstract
This document is intended to register new cipher suites for the
Transport Layer Security (TLS) protocol, according to the procedure
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specified in TLS Protocol standards. These cipher suites are based
on Russian national cryptographic standards - GOST R 34.10-94 and
GOST R 34.10-2001 public keys, GOST 28147-89 encryption algorithm and
GOST R 34.11-94 digest algorithm.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. CipherSuite Definitions . . . . . . . . . . . . . . . . . . . 3
2.1. Key Exchange . . . . . . . . . . . . . . . . . . . . . . . 3
2.2. PRF, Signature and Hash . . . . . . . . . . . . . . . . . 4
2.3. Cipher and MAC . . . . . . . . . . . . . . . . . . . . . . 4
3. Data Structures and Computations . . . . . . . . . . . . . . . 5
3.1. Algorithms . . . . . . . . . . . . . . . . . . . . . . . . 5
3.2. Keys Calculation . . . . . . . . . . . . . . . . . . . . . 5
3.3. Server Certificate . . . . . . . . . . . . . . . . . . . . 5
3.4. Server Key Exchange . . . . . . . . . . . . . . . . . . . 5
3.5. Certificate Request . . . . . . . . . . . . . . . . . . . 6
3.6. Client Key Exchange Message . . . . . . . . . . . . . . . 6
3.7. Certificate Verify . . . . . . . . . . . . . . . . . . . . 8
3.8. Finished . . . . . . . . . . . . . . . . . . . . . . . . . 9
4. Compatibility . . . . . . . . . . . . . . . . . . . . . . . . 9
5. Security Considerations . . . . . . . . . . . . . . . . . . . 9
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 9
7. References . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7.1. Normative references . . . . . . . . . . . . . . . . . . . 10
7.2. Informative references . . . . . . . . . . . . . . . . . . 12
Appendix A. ASN.1 Modules . . . . . . . . . . . . . . . . . . . . 12
A.1. Gost-CryptoPro-TLS . . . . . . . . . . . . . . . . . . . . 12
Appendix B. Acknowledgments . . . . . . . . . . . . . . . . . . . 14
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 15
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1. Introduction
This document proposes the addition of new cipher suites to the
Transport Layer Security (TLS) protocol to support GOST R 34.11-94
digest, GOST 28147-89 encryption and VKO GOST R 34.10-94/2001 key
exchange algorithms. The cipher suites defined here were proposed by
CRYPTO-PRO Company for the "Russian Cryptographic Software
Compatibility Agreement" community.
Algorithms GOST R 34.10-94, GOST R 34.10-2001, GOST 28147-89 and
GOST R 34.11-94 have been developed by Russian Federal Agency of
Governmental Communication and Information (FAGCI) and "All-Russian
Scientific and Research Institute of Standardization". They are
described in [GOSTR341094], [GOSTR341001], [GOSTR341194] and
[GOST28147] ([GOST3431095], [GOST3431004], [GOST3431195]).
Algorithms VKO GOST R 34.10-94/2001 and PRF_GOSTR3411 are described
in [CPALGS].
This document defines two configurations:
anonymous client - authenticated server (only server provides a
certificate);
authenticated client - authenticated server (client and server
exchange certificates).
The presentation language used here is the same as in [TLS1.2].
Since this specification extends [TLS1.2], these descriptions should
be merged with those in the TLS specification and any others that
extend TLS. This means, that enum types may not specify all possible
values and structures with multiple formats chosen with a select()
clause may not indicate all possible cases.
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL
NOT","SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in
this document are to be interpreted as described in [RFC2119].
2. CipherSuite Definitions
2.1. Key Exchange
The cipher suites defined here use the following key exchange
algorithms:
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+-------------------------------------+------------------------+
| CipherSuite | Key Exchange Algorithm |
+-------------------------------------+------------------------+
| TLS_GOSTR341094_WITH_28147_CNT_IMIT | VKO GOST R 34.10-94 |
| TLS_GOSTR341001_WITH_28147_CNT_IMIT | VKO GOST R 34.10-2001 |
| TLS_GOSTR341094_WITH_NULL_GOSTR3411 | VKO GOST R 34.10-94 |
| TLS_GOSTR341001_WITH_NULL_GOSTR3411 | VKO GOST R 34.10-2001 |
+-------------------------------------+------------------------+
Key derivation algorithms based on GOST R 34.10-94 and GOST R 34.10-
2001 public keys (VKO GOST R 34.10-94, VKO GOST R 34.10-2001) are
described in [CPALGS].
2.2. PRF, Signature and Hash
The cipher suites described here use HMAC and TLS PRF, as described
in section 5 of [TLS1.2], based on GOST R 34.11-94 hash function
(HMAC_GOSTR3411 and PRF_GOSTR3411), with parameter set identified by
id-GostR3411-94-CryptoProParamSet (refer to [CPALGS]). The same PRF
MUST be used for all dependent protocols, such as [EAP-TLS].
GOST R 34.10-94/2001 signature is used for CertificateVerify message.
GOST R 34.11 digest algorithm ([GOSTR341194]) is used for
CertificateVerify.signature.gostR3411_hash and Finished.verify_data
(see sections 7.4.10 and 7.4.11 of [TLS1.2])
2.3. Cipher and MAC
The following cipher algorithm and MAC functions are used (for
details refer to Section 3.1):
+-------------------------------------+-----------+----------------+
| CipherSuite | Cipher | MAC |
+-------------------------------------+-----------+----------------+
| TLS_GOSTR341094_WITH_28147_CNT_IMIT | GOST28147 | IMIT_GOST28147 |
| TLS_GOSTR341001_WITH_28147_CNT_IMIT | GOST28147 | IMIT_GOST28147 |
| TLS_GOSTR341094_WITH_NULL_GOSTR3411 | - | HMAC_GOSTR3411 |
| TLS_GOSTR341001_WITH_NULL_GOSTR3411 | - | HMAC_GOSTR3411 |
+-------------------------------------+-----------+----------------+
For all four cipher suites, the use of MAC is slighttly different
from the one, described in section 6.2.3.1 of [TLS1.2] for standard
stream ciphers, where MAC is calculated from the following data:
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MACed_data[seq_num] = seq_num +
TLSCompressed.type +
TLSCompressed.version +
TLSCompressed.length +
TLSCompressed.fragment;
Cipher suites defined in this document use the same input for first
record, but for each consequent record the input from all previous
records is concatenated:
MACed_data[0] + ... + MACed_data[n]
3. Data Structures and Computations
3.1. Algorithms
GOST 28147-89 [GOST28147] uses 256-bit key size and 8-byte IV.
Cipher suites, defined here, use GOST 28147-89 as a stream cipher in
counter mode with S-box parameter from id-Gost28147-89-CryptoPro-A-
ParamSet (see [CPALGS]) and CryptoPro key meshing algorithm.
IMIT_GOST28147 is GOST 28147-89 [GOST28147] in "IMITOVSTAVKA" mode (4
bytes)
3.2. Keys Calculation
Key calculation is done according to section 6.3 of [TLS1.2], using
PRF_GOSTR3411. The parameters are as follows:
SecurityParameters.enc_key_length = 32
SecurityParameters.mac_key_length = 32
SecurityParameters.fixed_iv_length = 8
Length of necessary key material is 144 bytes.
3.3. Server Certificate
For these cipher suites this message is required and it MUST contain
a certificate, with a public key algorithm matching
ServerHello.cipher_suite.
3.4. Server Key Exchange
This message MUST NOT be used in these cipher suites, because all the
parameters necessary are present in server certificate (see [CPPK]).
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3.5. Certificate Request
This message is used as described in section 7.4.4 of [TLS1.2], and
extended as follows:
enum {
gostr341094(21), gostr34102001(22),(255)
} ClientCertificateType;
gostr341094 and gostr34102001 certificate types identify that the
server accepts GOST R 34.10-94 and GOST R 34.10-2001 public key
certificates.
enum{
gostr3411(XX)
} HashAlgorithm;
enum{
gostr341094(XX), gostr34102001(XX)
} SignatureAlgorithm;
gostr3411 hash type identifes that the server accepts GOST R 34.11-94
hash function. It is RECOMMENDED to populate
CertificateRequest.certificate_hash only with gostr3411 value, when
one of the cipher suites described in this document is chosen.
The server SHOULD populate supported_signature_algorithm field with
SignatureAndHashAlgorithm pairs, where HashAlgorithm equals gostr3411
and SignatureAlgorithm matches corresponding ClientCertificateType.
3.6. Client Key Exchange Message
This message is used as described in section 7.4.7 of [TLS1.2], it is
required for these suites, and contains DER-encoded
TLSGostKeyTransportBlob structure [X.660].
enum { vko_gost } KeyExchangeAlgorithm;
struct {
select (KeyExchangeAlgorithm) {
case vko_gost: TLSGostKeyTransportBlob;
} exchange_keys;
} ClientKeyExchange;
ASN1-syntax for this structure is:
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TLSGostKeyTransportBlob ::= SEQUENCE {
keyBlob GostR3410-KeyTransport,
proxyKeyBlobs SEQUENCE OF TLSProxyKeyTransportBlob OPTIONAL
}
TLSProxyKeyTransportBlob ::= SEQUENCE {
keyBlob GostR3410-KeyTransport,
cert OCTET STRING
}
GostR3410-KeyTransport is defined in [CPCMS].
keyBlob.transportParameters MUST be present.
keyBlob.transportParameters.ephemeralPublicKey MUST be present if the
server didn't request client certificate or client's public key
algorithm and parameters do not match those of the recipient. Else
it SHOULD be omited.
proxyKeyBlobs - (optional) contains key exchange for secondary
recipients (for example, for the firewall, which audits connections).
cert - contains secondary recipient's certificate.
Actions of client:
First, the client generates a random 32-byte premaster_secret.
Then shared_ukm is calculated as first 8 bytes of digest of
concatenated client random and server random:
shared_ukm = GOSTR3411(client_random|server_random)[0..7]
Then client chooses a sender key. If
keyBlob.transportParameters.ephemeralPublicKey is present, the
corresponding secret key MUST be used as a sender key. If it is
missing, the secret key, corresponding to the client certificate MUST
be used.
Using the sender key and recipient's public key, algorithm VKO
GOST R 34.10-94 or VKO GOST R 34.10-2001 (described in [CPALGS]) is
applied to produce KEK. VKO GOST R 34.10-2001 is used with
shared_ukm as UKM.
Then CryptoPro Key Wrap algorithm is applied to encrypt
premaster_secret and produce CEK_ENC and CEK_MAC. Again, shared_ukm
is used as UKM. keyBlob.transportParameters.encryptionParamSet is
used for all encryption operations.
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The resulting encrypted key (CEK_ENC) is placed in
keyBlob.sessionEncryptedKey.encryptedKey field, it's mac (CEK_MAC) is
placed in keyBlob.sessionEncryptedKey.macKey field, and shared_ukm
(UKM) is placed in keyBlob.transportParameters.ukm field.
Actions of server:
Server MUST verify, that keyBlob.transportParameters.ukm is equal to
GOSTR3411(client_random|server_random)[0..7], before decrypting the
premaster_secret.
Server applies VKO GOST R 34.10-94 or VKO GOST R 34.10-2001,
(depending on the client public key type), and CryptoPro Key Unwrap
algorithm in the simillar manner to decrypt the premaster_secret.
Server MUST verify keyBlob.sessionEncryptedKey.macKey after
decrypting the premaster_secret.
3.7. Certificate Verify
This message is used as described in section 7.4.8 of [TLS1.2]. If
the client have sent both a client certificate and an ephemeral
public key, it MUST send a certificate verify message, as a proof of
possession of the private key for provided certificate.
The TLS structures are extended as follows:
enum { gostr341094, gostr34102001 }
SignatureAlgorithm;
select (SignatureAlgorithm) {
case gostr341094:
digitally-signed struct {
opaque gostr341194_hash[32];
};
case gostr34102001:
digitally-signed struct {
opaque gostr341194_hash[32];
};
} Signature;
CertificateVerify.signature.gostR3411_hash =
GOSTR3411(handshake_messages)
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3.8. Finished
This message is used as described in section 7.4.9 of [TLS1.2].
Finished.verify_data = PRF_GOSTR3411(master_secret, finished_label,
GOSTR3411(handshake_messages)) [0..11]
4. Compatibility
For historical reasons, some applications use the cipher suites
specified herein with [TLS1.0], using some features of [TLS1.2],
including cipher-suite dependent PRF, Finished and Certificate Verify
computations.
5. Security Considerations
It is RECOMMENDED that software applications verify signature values,
subject public keys and algorithm parameters to conform to
[GOSTR341001], [GOSTR341094] standards prior to their use.
Use of the same key for signature and key derivation is NOT
RECOMMENDED.
It is RECOMMENDED for both client and server to verify the private
key usage period, if this extension is present in the certificate.
The cipher suites TLS_GOSTR341094_WITH_28147_CNT_IMIT and
TLS_GOSTR341001_WITH_28147_CNT_IMIT proposed hereby, have been
analyzed by special certification laboratory of Scientific and
Technical Centre "ATLAS" in appropriate levels of
target_of_evaluation (TOE).
It is RECOMMENDED to subject the implementations of these cipher
suites to examination by an authorized agency with approved methods
of cryptographic analysis.
6. IANA Considerations
This document defines the following new cipher suites, whose values
presented here are used by several implementations of the same cipher
suites for TLS 1.0, and were described in previous drafts. They are
currently listed in the registry as reserved. IANA is requested to
update the TLS Cipher Suite registry defined in [RFC5246] with these
values.
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CipherSuite TLS_GOSTR341094_WITH_28147_CNT_IMIT = {0x00,0x80}
CipherSuite TLS_GOSTR341001_WITH_28147_CNT_IMIT = {0x00,0x81}
CipherSuite TLS_GOSTR341094_WITH_NULL_GOSTR3411 = {0x00,0x82}
CipherSuite TLS_GOSTR341001_WITH_NULL_GOSTR3411 = {0x00,0x83}
This document defines the following new client certificate types,
whose values presented here are used by several implementations of
the same suites for TLS 1.0, and were described in previous drafts.
They are currently listed in the registry as reserved. IANA is
requested to update the TLS ClientCertificateType Identifiers
Registry defined in [RFC5246] with these values.
enum {
gostr341094(21), gostr34102001(22)
} ClientCertificateType;
This document defines the following new signature algorithm types,
whose values are to be assigned from the TLS SignatureAlgorithm
Registry defined in [RFC5246].
enum{
gostr341094(XX), gostr34102001(XX)
} SignatureAlgorithm;
This document defines the following new hash algorithm types, whose
values are to be assigned from the TLS HashAlgorithm Registry defined
in [RFC5246].
enum {
gostr3411(XX)
} HashAlgorithm;
7. References
7.1. Normative references
[CPALGS] Popov, V., Kurepkin, I., and S. Leontiev, "Additional
Cryptographic Algorithms for Use with GOST 28147-89, GOST
R 34.10-94, GOST R 34.10-2001, and GOST R 34.11-94
Algorithms", RFC 4357, January 2006.
[CPCMS] Leontiev, S. and G. Chudov, "Using the GOST 28147-89, GOST
R 34.11-94, GOST R 34.10-94, and GOST R 34.10-2001
Algorithms with Cryptographic Message Syntax (CMS)",
RFC 4490, May 2006.
[CPPK] Leontiev, S. and D. Shefanovski, "Using the GOST R
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34.10-94, GOST R 34.10-2001, and GOST R 34.11-94
Algorithms with the Internet X.509 Public Key
Infrastructure Certificate and CRL Profile", RFC 4491,
May 2006.
[GOST28147]
Government Committee of the USSR for Standards,
"Cryptographic Protection for Data Processing System,
Gosudarstvennyi Standard of USSR (In Russian)",
GOST 28147-89, 1989.
[GOST3431004]
Council for Standardization, Metrology and Certification
of the Commonwealth of Independence States (EASC), Minsk,
"Information technology. Cryptographic Data Security.
Formation and verification processes of (electronic)
digital signature based on Asymmetric Cryptographic
Algorithm (In Russian)", GOST 34.310-2004, 2004.
[GOST3431095]
Council for Standardization, Metrology and Certification
of the Commonwealth of Independence States (EASC), Minsk,
"Information technology. Cryptographic Data Security.
Produce and check procedures of Electronic Digital
Signature based on Asymmetric Cryptographic Algorithm (In
Russian)", GOST 34.310-95, 1995.
[GOST3431195]
Council for Standardization, Metrology and Certification
of the Commonwealth of Independence States (EASC), Minsk,
"Information technology. Cryptographic Data Security.
Cashing function (In Russian)", GOST 34.311-95, 1995.
[GOSTR341001]
Government Committee of the Russia for Standards,
"Information technology. Cryptographic Data
Security.Signature and verification processes of
[electronic] digital signature, Gosudarstvennyi Standard
of Russian Federation (In Russian)", GOST R 34.10-2001,
2001.
[GOSTR341094]
Government Committee of the Russia for Standards,
"Information technology. Cryptographic Data Security.
Produce and check procedures of Electronic Digital
Signatures based on Asymmetric Cryptographic Algorithm,
Gosudarstvennyi Standard of Russian Federation (In
Russian)", GOST R 34.10-94, 1994.
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[GOSTR341194]
Government Committee of the Russia for Standards,
"Information technology. Cryptographic Data Security.
Hashing function, Gosudarstvennyi Standard of Russian
Federation (In Russian)", GOST R 34.11-94, 1994.
[TLS1.2] Dierks, T. and E. Rescorla, "The TLS Protocol",
draft-ietf-tls-rfc4346-bis-01 (work in progress),
June 2006.
7.2. Informative references
[EAP-TLS] Aboba, B. and D. Simon, "PPP EAP TLS Authentication
Protocol", RFC 2716, October 1999.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[TLS1.0] Dierks, T. and C. Allen, "The TLS Protocol Version 1.0",
RFC 2246, January 1999.
[X.660] ISO/IEC, "ITU-T Recommendation X.660 Information
Technology - ASN.1 encoding rules: Specification of Basic
Encoding Rules (BER), Canonical Encoding Rules (CER) and
Distinguished Encoding Rules (DER)", ITU-T X.660, 1997.
Appendix A. ASN.1 Modules
Additional ASN.1 modules, referenced here, can be found in [CPALGS]
and [CPCMS].
A.1. Gost-CryptoPro-TLS
Gost-CryptoPro-TLS
{ iso(1) member-body(2) ru(643) rans(2)
cryptopro(2) other(1) modules(1) gost-CryptoPro-TLS(16) 1 }
DEFINITIONS ::=
BEGIN
-- EXPORTS All --
-- The types and values defined in this module are exported for
-- use in the other ASN.1 modules contained within the Russian
-- Cryptography "GOST" & "GOST R" Specifications, and for the use
-- of other applications which will use them to access Russian
-- Cryptography services. Other applications may use them for
-- their own purposes, but this will not constrain extensions and
-- modifications needed to maintain or improve the Russian
-- Cryptography service.
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IMPORTS
Certificate,
AlgorithmIdentifier
FROM PKIX1Explicit88 {iso(1) identified-organization(3)
dod(6) internet(1) security(5) mechanisms(5) pkix(7)
id-mod(0) id-pkix1-explicit-88(1)}
id-CryptoPro-algorithms, gostR3410-EncryptionSyntax
FROM Cryptographic-Gost-Useful-Definitions
{ iso(1) member-body(2) ru(643) rans(2)
cryptopro(2) other(1) modules(1)
cryptographic-Gost-Useful-Definitions(0) 1 }
GostR3410-KeyTransport
FROM GostR3410-EncryptionSyntax
gostR3410-EncryptionSyntax
;
id-PRF-GostR3411-94 OBJECT IDENTIFIER ::=
{ id-CryptoPro-algorithms prf-gostr3411-94(23) }
TLSProxyKeyTransportBlob ::=
SEQUENCE {
keyBlob GostR3410-KeyTransport,
cert OCTET STRING
}
TLSGostKeyTransportBlob ::=
SEQUENCE {
keyBlob GostR3410-KeyTransport,
proxyKeyBlobs SEQUENCE OF
TLSProxyKeyTransportBlob OPTIONAL
}
TLSGostSrvKeyExchange ::=
SEQUENCE OF
OCTET STRING (CONSTRAINED BY {Certificate})
TLSGostExtensionHashHMACSelect ::=
SEQUENCE {
hashAlgorithm AlgorithmIdentifier,
hmacAlgorithm AlgorithmIdentifier,
prfAlgorithm AlgorithmIdentifier
}
TLSGostExtensionHashHMACSelectClient ::=
SEQUENCE OF
TLSGostExtensionHashHMACSelect
TLSGostExtensionHashHMACSelectServer ::=
TLSGostExtensionHashHMACSelect
END -- Gost-CryptoPro-TLS
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Appendix B. Acknowledgments
This document was created in accordance with "Russian Cryptographic
Software Compatibility Agreement", signed by FGUE STC "Atlas",
CRYPTO-PRO, Factor-TS, MD PREI, Infotecs GmbH, SPRCIS (SPbRCZI),
Cryptocom, R-Alpha. The aim of this agreement is to achieve mutual
compatibility of the products and solutions.
The authors wish to thank:
Microsoft Corporation Russia for provided information about
company products and solutions, and also for technical consulting
in PKI.
RSA Security Russia and Demos Co Ltd for active colaboration and
critical help in creation of this document.
NIP Informzachita for compatibility testing of the proposed data
formats while incorporating them into company products.
Citrix Inc for help in compatibility testing Citrix products for
Microsoft Windows.
Russ Hously (Vigil Security, LLC, housley@vigilsec.com) and
Vasilij Sakharov (DEMOS Co Ltd, svp@dol.ru) for initiative,
creating this document.
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Author's Addresses
Alexandr Afanasiev
Factor-TS
office 711, 14, Presnenskij val,
Moscow, 123557, Russian Federation
EMail: afa1@factor-ts.ru
Nikolaj Nikishin
Infotecs GmbH
p/b 35, 80-5, Leningradskij prospekt,
Moscow, 125315, Russian Federation
EMail: nikishin@infotecs.ru
Boleslav Izotov
FGUE STC "Atlas"
38, Obraztsova,
Moscow, 127018, Russian Federation
EMail: izotov@nii.voskhod.ru
Elena Minaeva
MD PREI
build 3, 6A, Vtoroj Troitskij per.,
Moscow, Russian Federation
EMail: evminaeva@mail.ru
Serguei Murugov
R-Alpha
4/1, Raspletina,
Moscow, 123060, Russian Federation
EMail: msm@top-cross.ru
Igor Ustinov
Cryptocom
office 239, 51, Leninskij prospekt,
Moscow, 119991, Russian Federation
EMail: igus@cryptocom.ru
Anatolij Erkin
SPRCIS (SPbRCZI)
1, Obrucheva,
St.Petersburg, 195220, Russian Federation
EMail: erkin@nevsky.net
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Authors' Addresses
Grigorij S. Chudov (editor)
CRYPTO-PRO, Ltd.
16/5, Suschevskij val
Moscow 127018
Russia
Phone: +7 (495) 780 48 20
Fax: +7 (495) 660 2330
Email: chudov@CryptoPro.ru
URI: http://www.CryptoPro.ru
Serguei E. Leontiev (editor)
CRYPTO-PRO, Ltd.
16/5, Suschevskij val
Moscow 127018
Russia
Phone: +7 (495) 933 11 68
Fax: +7 (495) 933 11 68
Email: lse@CryptoPro.ru
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Chudov & Leontiev Expires June 11, 2009 [Page 16]
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