@techreport{eap-psk-256-01, number = {draft-eap-psk-256-01}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-eap-psk-256/01/}, author = {Bruno ROHEE and Emmanuel KONAN and Michael Le Clerc and Clément Devun}, title = {{EAP-PSK-256: A Quantum resistant version of EAP-PSK}}, pagetotal = 45, year = 2026, month = jun, day = 22, abstract = {This document proposes a lightweight, quantum-resistant protocol for mutual authentication and secret key establishment based on a shared secret over a network. While the existing EAP-PSK protocol provides mutual authentication and key establishment, it faces significant limitations due to evolving security standards. EAP-PSK-256 addresses these vulnerabilities through the following rationales: * Quantum resistance: Legacy EAP-PSK uses the symmetric algorithm AES-128, which is theoretically vulnerable to Grover's cryptographic attack. This document specifies a new EAP protocol that uses quantum-resistant symmetric algorithms. * Regulatory Alignment: EAP-PSK-256 replaces the key generation mechanism used in EAP-PSK with a standardized key derivation mechanism from NIST SP800-108. * Enhanced Entropy: Unlike EAP-PSK, which relied solely on Peer randomness (RAND\_P) for session keys derivation, EAP-PSK-256 strengthens these keys by mixing entropy from both the Peer and the Server (RAND\_S). This ensures that both parties contribute to the cryptographic randomness of the session.}, }