Identity-based threshold key-insulated signature  

作　　者：Chen Jianhong Chen Kefei Long Yu 

机构地区：[1]Department of Computer Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China [2]Department of Computer Engineering, Huaiyin Institute of Technology, Huaian 223003, P. R. China [3]National Laboratory of Modern Communications, Chengdu 610041, P. R. China

出　　处：《High Technology Letters》2012年第3期275-280,共6页高技术通讯（英文版）

基　　金：Supported by the National Natural Science Foundation of China （No. 60970111, 61133014, 60903189, 60903020）.

摘　　要：Due to the compromise of the security of the underlying system or machine stonng the key, exposure of the private key can be a devastating attack on a cryptosystem. Key insulation is an important technique to protect private keys. To deal with the private （signing） key exposure problem in identity-based signature systems, we propose an identity-based threshold key-insulated signature （IBTKIS） scheme. It strengthens the security and flexibility of existing identity-based key-insulated signature schemes. Our scheme＇ s security is proven in the random oracle model and rests on the hardness of the computational Diffie-Helhnan problem in groups equipped with a pairing. To the best of our knowledge, it is the first IBTKIS scheme up to now.

关 键 词：threshold key-insulated SIGNATURE random oracle model 

分 类 号：TP309[自动化与计算机技术—计算机系统结构] TP391.41[自动化与计算机技术—计算机科学与技术]