Abstract:

To address the problem of huge number of signaling requests when large-scale devices request authentication in NB-IoT network， a low-cost group identity security authentication protocol based on Schnorr aggregate signature and Chinese reminder theorem was proposed.The protocol enabled the server to perform one-time authentication of the device group with a size-fixed group authentication request， which effectively reduced the bandwidth consumption of the authentication request.The protocol used a session key distribution mechanism based on the Chinese remaining theorem， allowing the server to complete the distribution of keys for each device in the group by size-fixed message.The results of security verification and the performance analysis show that the proposed protocol has reliable safety and superior performance in terms of transmission load and bandwidth consumption.

Key words: group-based identity security authentication protocol, Chinese remainder theorem, aggregate signature， NB-IoT