@misc{rfc9678, series = {Request for Comments}, number = 9678, howpublished = {RFC 9678}, publisher = {RFC Editor}, doi = {10.17487/RFC9678}, url = {https://www.rfc-editor.org/info/rfc9678}, author = {Jari Arkko and Karl Norrman and John Preuß Mattsson}, title = {{Forward Secrecy Extension to the Improved Extensible Authentication Protocol Method for Authentication and Key Agreement (EAP-AKA' FS)}}, pagetotal = 25, year = 2025, month = mar, 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.}, }