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Communications in computer and information science

Security Analysis of LWE/RLWE-Based Diffie-Hellman-Like Post-quantum Authenticated Key Exchange Protocols in the eCK Model

Wentao Li, Yu Zhou, Jinhua Wang, Xiangyu Pan, Yanyan Liu, Yu Li, Wenhui Ye

Published Aug 2, 2026• 0 citations
Publisher
DOI
10.1007/978-981-95-9514-3_13

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In this paper, we present a new ID-based two-party authenticated key exchange (AKE) protocol, which makes use of a new technique called twin Diffie-Hellman problem proposed by Cash, Kiltz and Shoup. We show that our scheme is secure under bilinear Diffie-Hellman (BDH) assumption in the enhanced Canetti-Krawczyk (eCK) model, which better supports the adversary's queries than previous AKE models. To the best of our knowledge, our scheme is the first ID-based AKE protocol provably secure in eCK model.