针对4G认证与密钥协商协议(EPS AKA)中存在的安全问题,提出了一种高效安全的改进协议(ES-AKA).该协议不仅能够抵抗重定向攻击和重放攻击,同时消除了密钥K泄露的安全隐患.安全性和协议性能分析表明:在更高的安全性能下,该协议降低了服务网络的存储空间和归属网络的计算量,有效减少了认证过程的比特通信量. Aiming at the security problems existed in 4G authentication and key agreement protocol (EPS AKA), an efficient and secure improved protocol (ES-AKA) is proposed, which not only can resist redirect attack and replay attack, Key K leaked security risks Security and protocol performance analysis shows that: With higher security, this protocol reduces the storage space of the service network and the amount of computing in the home network, effectively reducing the bit traffic of the authentication process.