计算机工程 ›› 2012, Vol. 38 ›› Issue (13): 122-124.doi: 10.3969/j.issn.1000-3428.2012.13.036

• 安全技术 • 上一篇    下一篇

具有代理重加密性质的自认证签密方案

王会歌1,王彩芬2,曹 浩1,赵 靖1,沈 峰1   

  1. (1. 安徽科技学院理学院,安徽 凤阳 233100;2. 西北师范大学数学与信息科学学院,兰州 730070)
  • 收稿日期:2012-03-14 出版日期:2012-07-05 发布日期:2012-07-05
  • 作者简介:王会歌(1981-),女,助教、硕士,主研方向:信息安全,密码学;王彩芬,教授、博士、博士生导师;曹 浩、赵 靖、沈 峰,讲师、硕士
  • 基金项目:
    国家自然科学基金资助项目(61163038);高等学校省级优秀青年基金资助项目(2012SQRL141);安徽省教育厅自然科学研究基金资助项目(KJ2010B059)

Self-certified Signcryption Scheme with Proxy Re-encryption Property

WANG Hui 1, WANG Cai-fen 2, CAO Hao 1, ZHAO Jing 1, SHEN Feng 1   

  1. (1. College of Science, Anhui Science and Technology University, Fengyang 233100, China; 2. College of Mathematics and Information Science, Northwest Normal University, Lanzhou 730070, China)
  • Received:2012-03-14 Online:2012-07-05 Published:2012-07-05

摘要: 对俞惠芳等的自认证签密方案(《计算机科学》,2010年第7期)进行分析,发现其中代理签密人可以恢复原始签密人的私钥。对此,基于双线性映射提出一个具有代理重加密性质的自认证签密方案,利用一个半可信的代理人,使对同一消息签密的解密身份可以在不同用户之间进行透明转换。与同类方案相比,该方案可以解决传统公钥密码体制的证书管理问题和身份密码体制中的密钥托管问题,同时具有安全性高、密钥长度短、计算量和通信量小的优点。

关键词: 自认证签密, 椭圆曲线, 离散对数, 代理重加密, 有限, 双线性映射

Abstract: By analyzing Yu Huifang’s self-certified signcryption scheme, this paper finds that the proxy can recover the private key of the original signcryptor, and proposes a self-certified signcryption scheme with the character of proxy re-encryption based on bilinear mapping. It makes use of a semi-trusted proxy to realize the transparent conversion between the different de-signcryptor’s identities of the signcryption on the same plaintext. Compared with another scheme, the scheme proposed can eliminate the certification management in the traditional public key cryptosystem and the key-escrow in the identity-based system, and it has advantages of high security, short key, low computing complexity and communication costs.

Key words: self-certified signcryption, elliptic curve, discrete logarithm, proxy re-encryption, definite field, bilinear mapping

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