中文摘要：

首先提出了一个基于身份的新签密算法,并对其安全性和效率进行了分析及证明;结果表明,该算法在随机预言机模型下是可证明安全的,而且与已有基于身份的签密算法相比,其计算量和传输代价小,特别适合用于ad hoc网络的密钥管理、安全路由等通信安全协议。最后,以ad hoc网络分布式门限密钥管理中各服务节点所拥有的系统密钥份额的更新为例,说明了将新签密算法用于ad hoc网络安全协议的方法及其意义。

英文摘要：

At first, a new identity based signcryption algorithm was proposed; its security and efficiency were analyzed. As a result, its provable security in the random oracle model is proved; compared with the previous identity based sign- cryption algorithms, the new algorithm has lower computation cost and communication overhead. It is very suitable for secure communication protocols of key management and secure routing in ad hoc networks. Finally, for showing the ap- plication methods and significance of new identity based signcryption algorithm in ad hoc networks, a share refreshing protocol of a serve node’s system private key in threshold key management of ad hoc networks is given.