标准模型下安全基于身份代理签密方案

计算机应用 ›› 2014, Vol. 34 ›› Issue (10): 2834-2839.

标准模型下安全基于身份代理签密方案

明洋,冯杰,胡齐俊

长安大学信息工程学院，西安 710064

收稿日期:2014-04-14 修回日期:2014-06-12 出版日期:2014-10-01 发布日期:2014-10-30
通讯作者: 冯杰
作者简介:明洋(1979-)，男，陕西榆林人，副教授，博士，主要研究方向：公钥密码学、可证明安全理论、无线网络安全；
冯杰(1987-)，女，陕西咸阳人，硕士研究生，主要研究方向：密码学、数字签名；
胡齐俊(1990-)，男，湖北黄冈人，硕士研究生，主要研究方向：网络信息安全。
基金资助:
教育部人文社会科学研究项目;中国博士后科学基金资助项目;西安市科技计划项目;中央高校基础研究支持计划资助项目

Secure identity-based proxy signcryption scheme in standard model

MING Yang,FENG Jie,HU Qijun

School of Information Engineering, Changan University, Xian Shaanxi 710064, China

Received:2014-04-14 Revised:2014-06-12 Online:2014-10-01 Published:2014-10-30
Contact: FENG Jie

摘要/Abstract

摘要：

针对现实中代理签密的安全问题，提出一种基于Gu等（GU K, JIA W J, JIANG C L. Efficient identity-based proxy signature in the standard model. The Computer Journal, 2013:bxt132）代理签名的标准模型下可证安全的基于身份代理签密方案。代理签密允许原始签密者授权签密能力给代理签密者，后者能够代表前者生成密文。该方案通过结合基于身份签密和代理签名，既保持了基于身份签密的优点，又具有代理签名的功能。分析表明，基于Diffie-Hellman问题假设下，所提方案满足机密性性和不可伪造性。与已知方案相比，代理密钥生成算法和代理签密算法中各需要2个对运算和1个对运算，方案效率更高。

Abstract:

Concerning the proxy signcryption security problem in reality, motivated by Gus proxy signature scheme (GU K, JIA W J, JIANG C L. Efficient identity-based proxy signature in the standard model. The Computer Journal, 2013:bxt132), a new secure identity-based proxy signcyption scheme in the standard model was proposed. Proxy signcryption allowed that the original signcrypter delegated his authority of signcrption to the proxy signcrypter in such a way that the latter could generate ciphertext on behalf of the former. By combining the functionalities of identity-based signcryption and proxy signature scheme, the new scheme not only had the advantage of identity-based signcryption scheme, but also had the function of proxy signature scheme. Analysis results show that, under the assumption of Diffie-Hellman problem, the proposed scheme is confidential and unforgeable. Compared with the known scheme, the scheme requires 2 pairings computation in proxy key generation and 1 pairing computation in proxy signcryption. So it has higher computational efficiency.

中图分类号:

TP309.2

明洋冯杰胡齐俊. 标准模型下安全基于身份代理签密方案[J]. 计算机应用, 2014, 34(10): 2834-2839.

MING Yang FENG Jie HU Qijun. Secure identity-based proxy signcryption scheme in standard model[J]. Journal of Computer Applications, 2014, 34(10): 2834-2839.

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