I-D Action: draft-chapman-a2a-mls-00.txt

Internet-Draft draft-chapman-a2a-mls-00.txt is now available.

   Title:   End-to-End Encryption and Purpose-Bound Governance for Agent-to-Agent Messaging
   Author:  Luke Daniel Chapman
   Name:    draft-chapman-a2a-mls-00.txt
   Pages:   24
   Dates:   2026-07-28

Abstract:

   Agent-to-agent protocols increasingly carry messages between
   autonomous software agents acting on behalf of distinct principals,
   including across organisational boundaries.  Existing protocols in
   this space secure the transport hop and authenticate the calling
   party, but do not provide message-level confidentiality, do not
   provide non-repudiable evidence of what a counterparty asserted, and
   do not carry machine-enforceable constraints on how a recipient may
   use the data conveyed.

   This document specifies a profile that addresses those three gaps.
   It defines a Governed Object: a signed, purpose-bound, expiring
   message envelope identified by a decentralised identifier.  It
   specifies how such objects are exchanged inside end-to-end encrypted
   sessions established using the Messaging Layer Security (MLS)
   protocol [RFC9420], and how the MLS credential is cryptographically
   bound to the sending agent's identity.  It defines the encapsulation
   of these constructs as an extension to an agent-to-agent transport,
   using the Agent2Agent (A2A) protocol [A2A] as the reference binding,
   and specifies mandatory receiver-side processing rules including
   replay rejection and purpose enforcement.

The IETF datatracker status page for this Internet-Draft is:
https://datatracker.ietf.org/doc/draft-chapman-a2a-mls/

There is also an HTML version available at:
https://www.ietf.org/archive/id/draft-chapman-a2a-mls-00.html

Internet-Drafts are also available by rsync at:
rsync.ietf.org::internet-drafts


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