LeeB私钥分发协议的改进方案

基金项目:

国家“九七三”基金资助项目(2007CB311100)

北京工业大学博士科研启动基金资助项目(52007016200704)

北京工业大学青年科学基金(X1007016200802).

详细信息

An Improved Scheme of LeeB Secure Key Issuing Protocol

College of Computer Science and Technology, Beijing University of Technology, Beijing 100124, China

摘要: 为了解决LeeB协议中存在的用户私钥托管问题, 通过采用公开的身份密钥对来确认用户的身份, 提出一种改进方案, 并分析了该方案的安全性与执行效率.改进方案解决了LeeB协议中存在的安全问题, 且运算量减少了4n次对运算和2n次哈希运算.
- 基于身份的加密 /
- 私钥分发协议 /
- 私钥托管 /
- 身份密钥对
Abstract: To resolve user's key escrow problem of Lee B et al's protocol, this paper presents an improvement by an identity-password pair published for confirming user identity and analyzes its security and efficence.The improved scheme overcomes the disadvantages of LeeB et al.ṥ scheme and save at least 4n pairing and 2n Hash operations.
- identity-based cryptography /
- key issuing protocol /
- key-escrow problem /
- Identity key pair

[1]	SHAMIR A.Identity-based cryptosystem and signature schemes[C]∥Advances in Cryptology 1984.Berlin:Springer-Verlag, 1984:47-53.
[2]	PATERSON K G. ID-based signatures from pairings on elliptic curves[J]. Electronics Letters, 2003, 38 (18) : 1025-1026.
[3]	BONEHD, FRANKLINM.Identity based encryption from weil pairing[C]∥Advances in Cryptology1984.Berlin:Springer-Verlag, 2001:213-229.
[4]	BONEHD, FRANKLI N M.Short signature from weil pairing[C]∥Boyd C Asiacrypt 2001, Berlin:Springer-Verlag, 2001:514-532.
[5]	CHEN L, HARRISON K, SOLDERA D, et al.Applications of multiple trust authorities in pairing based cryptosystems[C]∥Proc of Infrastructure Security Conference.Berlin:Springer-Verlag, 2002:260-275.
[6]	GENTRY C.Certificate-based encryption and the certificate revocation problem[C]∥Advances in Cryptology-EUROCRYPT2003.Berlin:Springer-Verlag, 2003:272-293.
[7]	AL-RIYAMI S, PATERSON K.Certificateless public key cryptography[C]∥Advances in Cryptology-Asiacrypt'2003.Berlin:Springer-Verlag, 2003:452-472.
[8]	LEE B, BOYD E, DAESON E, et al.Secure key issuing in ID-based cryptography[C]∥In Proceedings of the SecondAustralian Information Security Workshop-AISW 2004.New Zealand:Australian Computer Society, Inc, 2004:69-74.