In the face of quantum technology's impact on traditional cryptography,research on lattice-based Password-Authenticated Key Exchange (PAKE) protocols has gained significant attention. How-ever,current lattice-based PAKE protocols often require two or three rounds,leading to heavy transmis-sion loads. Additionally,existing one-round lattice-based protocols are mainly suited for one-on-one communication and lack identity authentication. To address these issues,a novel lattice-based one-round identity authentication protocol based on key consensus has been proposed. This innovative solu-tion combines lattice-based public key encryption,ASPH functions,and key consensus to achieve effi-cient and secure identity authentication and key negotiation within a single communication round. This breakthrough has the potential to address the challenges posed by quantum technology to cryptography and extend its applicability to many-to-many communication scenarios.
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