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计算机工程 ›› 2011, Vol. 37 ›› Issue (19): 120-121,125. doi: 10.3969/j.issn.1000-3428.2011.19.039

• 安全技术 • 上一篇    下一篇

一种基于身份的代理签密体制

王 琴   

  1. (普华基础软件股份有限公司,上海 200233)
  • 收稿日期:2011-06-20 出版日期:2011-10-05 发布日期:2011-10-05
  • 作者简介:王 琴(1977-),女,博士,主研方向:密码学,网络 安全
  • 基金资助:
    国家科技支撑计划基金资助项目(2011BAH14B02)

Proxy Signcryption System Based on Identity

WANG Qin   

  1. (iSoft Infrastructure Software Co., Ltd., Shanghai 200233, China)
  • Received:2011-06-20 Online:2011-10-05 Published:2011-10-05

摘要: 基于身份的代理签密结合身份的密码学和代理签密的特点,允许实体将签密的权力交由可信的代理执行,同时原始发送者、代理发送者以及接收者的公钥都由其唯一身份来确定。运用双线性配对构造一个基于身份的代理签密体制,该代理签密体制在传输过程中不需要安全通道,在通信和计算方面较同类体制具有更高的效率。分析结果表明,该代理签密体制在随机预言模型下是安全的。

关键词: 基于身份的密码学, 代理签密, 双线性对, 随机预言模型

Abstract: Identity-based proxy signcryption combines the functionalities of identity-based cryptography and proxy signcryption, and allows an entity to delegate its authority of signcryption to a trusted agent. At the same time the public keys of the original sender, the proxy sender and the receiver are all determined by their unique identities. This paper constructs an identity-based proxy signcryption scheme based on bilinear pairings which does not need any secure channel and is much more efficient than the scheme proposed before. Analyze result shows that the proposed scheme is secure in the random oracle model.

Key words: cryptography based on identity, proxy signcryption, bilinear pairing, random oracle model

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