摘要
基于身份的密码方案,将用户的公钥与用户的个人信息绑定,因此不再需要公钥证书,从而提高了管理效率。在代理签名中原始签名人可以将签名权利下放给代理签名人,从而将自己从"繁琐"的签名事务中解放出来。提出了一个新的基于身份的代理签名方案,并在随机预言模型下证明了其安全性。该方案在代理授权阶段只需要1次双线性对的计算,代理签名阶段也只需要2次双线性对计算,与以往方案比较,该方案在效率方面有显著提高。
In identity based cryptosystem, the user' s public key is bonded to user' s personal information, so it doesn't need public key certificate, and improves the management efficiency. In the proxy signature, original signer's signature right is trans- ferred to proxy signer, thus theirself liberated from "trival" signature affairs. It proposes a new identity based proxy signature scheme and proves its security under the random oracle model. In the scheme, it needs 1 pairing in delegation of proxy right, 2 pairings in verification of proxy signature. Compared with the previous schemes, the efficiency is significantly improved.
出处
《计算机工程与应用》
CSCD
2013年第14期98-100,共3页
Computer Engineering and Applications
基金
贵州师范大学博士科研基金(No.11904-05032130008)
贵州省科学技术基金(No.黔科合J字[2013]2214)
关键词
基于身份密码
代理签名
双线性对
随机预言模型
identity-based cryptography
proxy signature
bilinear pairings
random oracle model