基于双线性对和随机数的云计算环境匿名认证协议

针对云计算服务的高安全性要求，提出一种云计算环境下的匿名身份认证协议，给出了适用于身份认证的场景模型。协议中使用双线性对构造用户动态身份，引入随机数代替时间戳，解决了传统基于时间戳机制方案的时钟同步问题。协议基于离散对数计算困难性和哈希函数的不可逆性实现双向认证，具有安全性强、效率高等特点，可应用于对用户隐私保护要求较高的分布式云计算环境。

Anonymous Authentication Protocol Based on Bilinear Pairing and Nonce in Cloud Computing

Aiming at the high requirements for security of cloud computing services , it proposes an anon-ymous authentication protocol in cloud computing , and designs a model that suits identity authentication . The temporary identity of the user was constructed by using bilinear pairings .Besides, the nonce was used to replace time stamps to avoid the problem of clock synchronization .The protocol implements mutu-al authentication , based on the calculation difficulty of the Discrete Logarithm Problem and the irreversi-bility of hash function .The protocol is efficient and has the characteristic of high security .It can be ap-plied in distributed cloud environments , which need to protect the users＇privacy .