Identity-Based Intrusion-Resilient Signature

摘要：

Standard identity-based signature schemes typically rely on the assumption that secret keys are kept perfectly secure. However, with more and more cryptographic primitives are deployed on insecure devices, key-exposure seems inevitable. To minimize the damage caused by key-exposure in ID-based signature scenarios, Zhou et al. applied Dodis et al.s key-insulation mechanism and proposed an ID-based key-insulated signature (IBKIS) scheme. However,their scheme is not secure enough, I.e, if an adversary compromises the helper key, he can derive all the temporary secret keys and sign messages on behalf the legitimate user. In this paper, we propose an ID-based signature scheme with stronger key security. The proposed scheme remains secure in the face of multiple compromises of both the user and the helper, as long as they are not both compromised simultaneously. Furthermore, in case the user and helper are compromised simultaneously, prior time periods remain secure.

作者: Hongwei Li Shixin Sun

作者单位: Department of computer science UEST of China, chengdu,sichuan, china

会议类型: 国际会议

会议名称: 2007年通信、电路与系统国际会议(2007 International Conference on Communications,Circuits and Systems Proceedings)

会议地点: 日本福冈

会议语种:英文

在线出版日期: 2007-07-11（万方平台首次上网日期，不代表论文的发表时间）