摘要
已有的代理签密方案存在签密不能被公开验证、代理权不能安全被撤销、原始签密人的私钥被泄漏等缺陷。分析了YHSW方案的安全性,并利用双线性对和哈希函数,提出了一个可撤销代理权的基于身份的多代理多签密方案。提出的方案满足安全代理签密的所有安全性要求。在提出的方案中引入了时间戳,原始签密群不需要第三方的帮助就能安全地撤销代理权。代理权撤销后,以前的代理签密的有效性仍能被公开验证。
The previous proxy signcryption schemes have some drawbacks,such that the signcryption can＇t be verified publicly;the power of proxy can＇t be revocated safely;the private key of the original signer can be leaked out,and etc.In this paper,the security of the YHSW scheme is analyzed.The bilinear parings and Hash function are adopted to propose an id-based multiproxy multi-signcryption scheme with the property of proxy revocation.The proposed scheme can satisfy all security request of the secure proxy signcryption.In the proposed scheme,the time stamp is adopted.The group of original signers can revocate the power of proxy safely without the help of the third party.After the power of proxy being revocated,the validity of previous proxy signcryptions still can be verified publicly.
出处
《计算机工程与应用》
CSCD
北大核心
2010年第13期76-79,94,共5页
Computer Engineering and Applications
基金
国家自然科学基金No.60773035
西南交通大学信息编码与传输四川省重点实验室开放研究基金资助课题No.08226138~~
关键词
代理签密
基于身份
多代理多签密
双线性对
proxy signcryption
identity based
multi-proxy multi-signcryption
bilinear parings
