RFC 9678

Forward Secrecy Extension to the Improved Extensible Authentication Protocol Method for Authentication and Key Agreement (EAP-AKA' FS), March 2025

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Status:
PROPOSED STANDARD
Updates:
RFC 5448, RFC 9048
Authors:
J. Arkko
K. Norrman
J. Preuß Mattsson
Stream:
IETF
Source:
emu (sec)

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DOI:  https://doi.org/10.17487/RFC9678

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Abstract

This document updates RFC 9048, "Improved Extensible Authentication Protocol Method for 3GPP Mobile Network Authentication and Key Agreement (EAP-AKA')", and its predecessor RFC 5448 with an optional extension providing ephemeral key exchange. The extension EAP-AKA' Forward Secrecy (EAP-AKA' FS), when negotiated, provides forward secrecy for the session keys generated as a part of the authentication run in EAP-AKA'. This prevents an attacker who has gained access to the long-term key from obtaining session keys established in the past. In addition, EAP-AKA' FS mitigates passive attacks (e.g., large-scale pervasive monitoring) against future sessions. This forces attackers to use active attacks instead.


For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 8729.




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