泛欧数字移动通信网中认证和加密技术的研究与实现

Study and implementation of techniques of authentication and encryption in group special mobile

详细分析了泛欧数字移动通信网中的认证和加密技术，指出其不足之处，并给出改进方法．根据泛欧数字移动通信网的有关标准，设计了加密算法（Ａ５算法）和身份认证／密钥分配算法（Ａ３／Ａ８算法）；对上述算法的模拟实验和安全性分析结果表明：这些算法不仅容易实现。

The techniques of authentication and encryption have been analyzed thoroughly in Group Special Mobile, with some drawbacks found and improvement presented. According to the related standards of GSM, two implementation schemes are proposed, one for authenticating the subscribers identity and distributing a secret key between the subscriber and base station, the other for protecting the radio channel. The results of simulation and cryptoanalysis show that the above two schemes are easy to implement and secure against the cryptoanalysis methods available.