IDENTITY-BASED KEY-INSULATED PROXY SIGNATURE  

作　　者：Wan Zhongmei Lai Xuejia Weng Jian Liu Shengli Hong Xuan 

机构地区：[1]Department of Computer Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China [2]Department of Mathematics, College of Science, Hohai University, Nanjing 210098, China [3]Department of Computer Science, Jinan University, Guangzhou 510632, China

出　　处：《Journal of Electronics(China)》2009年第6期853-858,共6页电子科学学刊（英文版）

基　　金：Supported by the National Natural Science Foundation of China (No. 60573032, 60773092, 90604036, 60873229, 60903178, 60672072, 60832003);Zhejiang Provincial Natural Science Foundation of China (No. Y106505)

摘　　要：In proxy signature schemes,the proxy signer B is permitted to produce a signature on behalf of the original signer A. However,exposure of proxy signing keys can be the most devastating attack on a proxy signature scheme since any adversary can sign messages on behalf of the proxy signer. In this paper,we applied Dodis,et al.’s key-insulation mechanism and proposed an Identity-Based (ID-based) Key-Insulated Proxy Signature (IBKIPS) scheme with secure key-updates. The proposed scheme is strong key-insulated and perfectly key-insulated. Our scheme also supports unbounded period numbers and random-access key-updates.In proxy signature schemes, the proxy signer B is permitted to produce a signature on behalf of the original signer A. However, exposure of proxy signing keys can be the most devastating attack on a proxy signature scheme since any adversary can sign messages on behalf of the proxy signer. In this paper, we applied Dodis, et al.＇s key-insulation mechanism and proposed an Identity-Based （ID-based） Key-Insulated Proxy Signature （IBKIPS） scheme with secure key-updates. The proposed scheme is strong key-insulated and perfectly key-insulated. Our scheme also supports unbounded period numbers and random-access key-updates.

关 键 词：KEY-INSULATED Proxy signature Identity-based signature Key-exposure Bilinear pairings 

分 类 号：TP309[自动化与计算机技术—计算机系统结构] TP393.08[自动化与计算机技术—计算机科学与技术]