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Rats Status Pages

Remote ATtestation ProcedureS (Active WG)
Sec Area: Roman Danyliw, Benjamin Kaduk | 2019-Mar-07 —  

2021-03-22 charter

Remote ATtestation ProcedureS (rats)


 Current Status: Active

     Kathleen Moriarty <Kathleen.Moriarty.ietf@gmail.com>
     Nancy Cam-Winget <ncamwing@cisco.com>
     Ned Smith <ned.smith@intel.com>

 Security Area Directors:
     Roman Danyliw <rdd@cert.org>
     Benjamin Kaduk <kaduk@mit.edu>

 Security Area Advisor:
     Roman Danyliw <rdd@cert.org>

 Mailing Lists:
     General Discussion: rats@ietf.org
     To Subscribe:       https://www.ietf.org/mailman/listinfo/rats
     Archive:            https://mailarchive.ietf.org/arch/browse/rats/

Description of Working Group:


  In network protocol exchanges, it is often the case that one entity (a relying
  party) requires evidence about the remote peer (and system components [RFC4949]
  thereof), in order to assess the trustworthiness of the peer.  Remote
  attestation procedures (RATS) enable relying parties to establish a level of
  confidence in the trustworthiness of remote system components through the
  creation of attestation evidence by remote system components and a processing
  chain towards the relying party.  A relying party can then decide whether to
  consider a remote system component trustworthy or not.

  To improve the confidence in a system component's trustworthiness, a relying
  party may require evidence about:
  * system component identity,
  * composition of system components, including nested components,
  * roots of trust,
  * assertion/claim origination or provenance,
  * manufacturing origin,
  * system component integrity,
  * system component configuration,
  * operational state and measurements of steps which led to the operational state, or
  * other factors that could influence trust decisions.

  While domain-specific attestation mechanisms such as Trusted Computing Group
  (TCG) Trusted Platform Module (TPM)/Trusted Software Stack (TSS), Fast Identity
  Online (FIDO) Alliance attestation, and Android Keystore attestation exist,
  there is no interoperable way to create and process attestation evidence to
  make determinations about system components among relying parties of different
  manufactures and origins.


  This WG will standardize formats for describing assertions/claims about system
  components and associated evidence; and procedures and protocols to convey
  these assertions/claims to relying parties.  Given the security and privacy
  sensitive nature of these assertions/claims, the WG will specify approaches to
  protect this exchanged data.  While a relying party may use reference, known, or
  expected values or thresholds to assess the assertions/claims, the procedures
  for this activity are out of scope for this WG (without rechartering).

  The working group will cooperate and coordinate with other IETF WGs such as
  TEEP, SUIT, and SACM, and work with organizations in the community, such as the TCG
  and the FIDO Alliance, as appropriate.  The WG will also evaluate prior work
  such as NEA and proprietary attestation technologies like the Android Keystore.

  Program of Work

  The working group will develop standards supporting interoperable remote
  attestation procedures for system components. The main deliverables are as

  1. Specify use cases for remote attestation (to document and achieve WG
  consensus but not expected to be published as an RFC).

  2. Specify terminology and architecture that enable attestation techniques.
  The architecture may include a system security model for the signing key
  material and involve at least the system component, system component provider,
  and the relying authority.

  3. Standardize an information model for assertions/claims which provide
  information about system components characteristics scoped by the specified

  4. Standardize data models that implement and secure the defined information
  model (e.g., CBOR Web Token structures [RFC8392], JSON Web Token structures

  5. Standardize interoperable protocols to securely convey assertions/claims.

Goals and Milestones:
  Mar 2019 - Call for adoption on TUDA draft
  Dec 2020 - Submit YANG Module draft to IESG for publication
  Dec 2020 - Submit TUDA draft to IESG for publication
  Mar 2021 - Submit EAT draft to IESG for publication
  Mar 2021 - Submit RIV draft to IESG for publication
  Jul 2021 - Submit Interaction Models draft to IESG for publication
  Jul 2021 - Submit Architecture draft to IESG for publication
  Done     - Begin work on use case documentation (may not be published as an RFC)
  Done     - Call for adoption on EAT draft.
  Done     - Call for adoption on Interaction Model draft
  Done     - Call for adoption on architecture draft
  Done     - Call for adoption on Yang Module draft

All charter page changes, including changes to draft-list, rfc-list and milestones:

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