具有已知代理人的不可否认门限代理签密方案(英文)  

A Nonrepudiable Threshold Proxy Signcryption Scheme with Known Proxy Agent

作　　者：李继国[1] 李建中[1] 曹珍富[2] 张亦辰[3] 

机构地区：[1]哈尔滨工业大学计算机科学与技术学院,黑龙江哈尔滨150001 [2]上海交通大学计算机科学与工程系,上海200030 [3]齐齐哈尔大学计算机科学与工程系,黑龙江齐齐哈尔161005

出　　处：《软件学报》2003年第12期2021-2027,共7页Journal of Software

基　　金：国家自然科学基金;国家杰出青年科学基金;国家教育部博士点基金;国家高技术研究发展计划(863);国家重点基础研究发展规划(973)~~

摘　　要：1996年,Mambo等人提出了代理签名概念.但是,代理签名仅能提供授权的认证而不能提供保密性.Chan和Wei提出一个门限代理签密方案(记为Chan-Wei方案),扩展了代理签名的概念.指出他们的方案不满足强不可伪造性、强不可否认性和强识别性.基于Chan-Wei方案,提出一个能够克服Chan-Wei方案缺点的不可否认门限代理签密方案.给出方案的完备性证明和安全性分析.此外,与Chan-Wei方案相比,所提出的方案能够确切地发现哪些代理人提供假子密钥或篡改子密钥.In 1996, Mambo et al. introduced the concept of proxy signature. However, a proxy signature only provides the delegated authenticity and doesnt provide the confidentiality. Chan and Wei proposed a threshold proxy signcryption scheme (denoted as Chan-Wei scheme), which extended the concept of proxy signature. In this paper, the authors demonstrate Chan-Wei scheme does not satisfy strong unforgeablity, strong nonrepudiation and strong identifiability. Based on Chan-Wei scheme, a nonrepudiable threshold proxy signcryption scheme with known proxy agents is proposed. The proposed scheme overcomes the weaknesses of Chan-Wei scheme. Completeness proof and security analysis of the proposed scheme are presented. In addition, compared with Chan-Wei scheme, the proposed scheme exactly finds out which proxy agents present bogus secret shadow or tamper secret shadow.

关 键 词：代理签密 代理签名 门限密码学 离散对数 不可否认性 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]