Code change:
interaction models in general, the following set of prerequisites MUST be in place to support the implementation of interaction models: <ins> A statement about a distinguishable Attester made by an Endorser without accompanying evidence about its validity, used as proof of identity. </ins> The provenance of Evidence with respect to a distinguishable Attesting Environment MUST be correct and unambiguous. <del> An Attester Identity MAY be a unique identity, it MAY be included in a zero-knowledge proof (ZKP), or it MAY be part of a group signature, or it MAY be a randomised DAA credential DAA. </del> <ins> An Attester Identity MAY be a unique identity, MAY be included in a zero-knowledge proof (ZKP), MAY be part of a group signature, or it MAY be a randomized DAA credential DAA. </ins> Attestation Evidence MUST be authentic. In order to provide proofs of authenticity, Attestation Evidence SHOULD be cryptographically associated with an identity document <del> (e.g. an PKIX certificate or trusted key material, or a randomised </del> <ins> (e.g. an PKIX certificate or trusted key material, or a randomized </ins> DAA credential DAA), or SHOULD include a correct and unambiguous and stable reference to an accessible identity document.

Related discussion:
text: 1) Can a DAA Issuer have multiple key pairs and use them for one Attester? 2) Can a DAA Issuer use one key pair to generate multiple credentials for one Attester? o A credential is conveyed from an Endorser to an Attester in combination with the conveyance of the public key certificates from Endorser to Verifier. Comment > Is there another way to convey the public key certificate, for example, can the public key certificates be conveyed from Endorser to Attester first and then from Attester to Verifier? The zero-knowledge proofs required cannot be created by an Attester alone - like the Endorsements of RoTs - and have to be created by a trustable third entity - like an Endorser. Due to that semantic overlap, the Endorser role is augmented via the definition of DAA duties as defined below. This augmentation enables the Endorser to convey trustable third party statements both to Verifier roles and Attester roles. Comment > For "the definition of DAA duties as defined below", what is the definition of DAA duties? Comment > In the last sentence, the Endorsement with its original definition is the third party statement for Verifier and Attester, isn't it? So, "augmentation" isn't the correct expression. Section 6 Normative Prerequisites Attester Identity: The provenance of Evidence with respect to a distinguishable Attesting Environment MUST be correct and unambiguous. Comment > The Attester Identity is to identify which Attester the Evidence comes from. But if the Attester has multiple Attesting Environments, what should be the Attester Identity? Comment > The TPM's AIK certificate is one kind of Attester Identity, right? Attestation Evidence Authenticity: Attestation Evidence MUST be correct and authentic. Comment > Is it appropriate to say "correct Evidence"? If saying so, I think it means that the Evidence satisfies the Attestation Policy for Evidence. Authentication Secret: An Authentication Secret MUST be available exclusively to an Attester's Attesting Environment. The Attester MUST protect Claims with that Authentication Secret, thereby proving the authenticity of the Claims included in Evidence. The Authentication Secret MUST be established before RATS can take place. Comment > Does the Authentication Secret represent the identity of the Attesting Environment?