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Currently, due to the high scalability and global coverage of spaceinformation network (SIN), more service providers and users are willing toprovide or subscribe to personal services through the satellite network.However, the messages are transmitted in public satellite-ground links, whichmakes access users vulnerable to various forms of attacks. Existingauthentication protocols do not meet the expected security and short delayrequirements to ensure the security of real-time user access and theconfidentiality of communication content. Moreover, with the development ofquantum computers, the difficult problems such as ECDLP and DLP have also beenproven to be solvable in polynomial time, leading to new threats. Therefore, inthis paper, we propose a provably secure and anti-quantum authenticationprotocol based on randomized RLWE. The protocol not only meets the pre-definedsecurity requirements, but also reduces the total delay of the authenticationphase based on the pre-negotiation and fewer authentication transmission. Inaddition, a concise handover scheme is designed for signal handover scenarioscaused by satellite dynamic topology. Further rigorous formal and informalsecurity proofs and performance analysis show that our proposed protocol ismore applicable to SIN, while ensuring higher security and resisting variousattacks with lower authentication delay.

PSAA: Provable Secure and Anti-Quantum Authentication Based on Randomized RLWE for Space Information Network