RFC 9528

Ephemeral Diffie-Hellman Over COSE (EDHOC), March 2024

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G. Selander
J. Preuß Mattsson
F. Palombini
lake (sec)

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DOI:  https://doi.org/10.17487/RFC9528

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This document specifies Ephemeral Diffie-Hellman Over COSE (EDHOC), a very compact and lightweight authenticated Diffie-Hellman key exchange with ephemeral keys. EDHOC provides mutual authentication, forward secrecy, and identity protection. EDHOC is intended for usage in constrained scenarios, and a main use case is to establish an Object Security for Constrained RESTful Environments (OSCORE) security context. By reusing CBOR Object Signing and Encryption (COSE) for cryptography, Concise Binary Object Representation (CBOR) for encoding, and Constrained Application Protocol (CoAP) for transport, the additional code size can be kept very low.

For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 8729.

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