A Three-Party Batch Authentication Based on Twisted Edwards-Curve in Mobile Edge Computing

Mobile Edge Computing (MEC), as a core infrastructure in the evolution of 5G networks, offers distributed computing power support for low-latency sensitive services. However, the existing authentication mechanism faces multiple challenges: the DoS attacks, the overload of edge servers due to high-intensity concurrent authentication requests, and fail to protect user’s privacy. To address these issues, We have proposed a three-party authentication protocol with conditional anonymity, which reduces the computational cost by 52% in average while ensuring security. Unlike existing schemes, we construct the batch authentication and key agreement protocol based on collaboration between gNBs and mobile edge servers, effectively mitigating the computing and communication overhead pressure on mobile edge servers. Secondly, we employ temporary public key mechanism and sparse Merkle tree multi-proof algorithm to achieve user’s unlinkability and resist DoS attacks, respectively. Experiments demonstrate that our protocol significantly exceeds existing protocols in aspects of security attributes, computing overhead, and communication overhead, providing a theoretical basis and methodological support for the secure deployment of large-scale MEC services.