基于CRT的gNB间切换认证方法与密钥协商协议

针对当前UE在gNB间的切换认证与密钥协商过程存在的只具有两跳前向安全性和易受拒绝服务攻击等问题,提出了一种基于中国剩余定理（CRT）的切换认证与密钥协商协议。该协议利用秘密共享原理,令源gNB和所有可能的目标gNB构成一个群体,把真实的参数作为“秘密”在源gNB和唯一的目标gNB间共享,使得关键参数NH和NCC能在源gNB和目标gNB间安全传输。实验结果表明,该协议是安全的,相比同类的改进协议具有效率优势。

Handover authentication method and key agreement protocol between gNB based on CRT

The handover authentication and key agreement process between UE and gNB have some defects, such as two hop forward security and vulnerable to denial of service attack. To solve these problems, this paper proposed a handover authentication and key agreement protocol based on China remainder theorem(CRT). The protocol formed a group between source gNB and all possible target gNBs by using the principle of secret sharing. The source gNB and the only target gNB shared the real parameters as "secrets", so that the source gNB transmitted the key parameters NH and NCC to the target gNB safely. The simulation results show that the protocol is secure and has efficiency advantages compared with other similar improved protocols.