I-D Action: draft-choudhary-rcoap-00.txt

Internet-Draft draft-choudhary-rcoap-00.txt is now available.

   Title:   Ratcheted CoAP: A Forward-Secure Delta over OSCORE for Highly Constrained Wake-Send-Sleep Devices
   Author:  Divyanshu Choudhary
   Name:    draft-choudhary-rcoap-00.txt
   Pages:   10
   Dates:   2026-08-29

Abstract:

   This document specifies RCOAP, a compact, zero-round-trip, link-layer
   agnostic object-security mechanism for highly constrained devices
   that transmit infrequently.  RCOAP is a targeted delta over OSCORE
   ([RFC8613]): instead of a single long-lived Sender Key, RCOAP derives
   a fresh symmetric key for every message via a one-way hash ratchet.
   This bounds the impact of physical device capture to future messages
   only, at the cost of a modest per-message size increase and the loss
   of future secrecy.  RCOAP is explicitly scoped to a narrow niche left
   open between OSCORE and EDHOC ([RFC9528]): devices for which even
   EDHOC's one-time handshake cost is disproportionate to their message
   rate or compute budget.  This document is a first individual
   submission, has not been reviewed by the IETF, and requests feedback
   in particular from the LAKE and CoRE working groups on whether this
   gap is real and worth standardizing, or already adequately covered.

The IETF datatracker status page for this Internet-Draft is:
https://datatracker.ietf.org/doc/draft-choudhary-rcoap/

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

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


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