Certified E-Mail Protocol in the ID-Based Setting

Authors:
Chunxiang Gu;Yuefei Zhu;Yonghui Zheng
Affiliations:
Network Engineering Department, Zhengzhou Information Science and, Technology Institute, P.O. Box 1001-770, Zhengzhou, 450002, P.R. China;Network Engineering Department, Zhengzhou Information Science and, Technology Institute, P.O. Box 1001-770, Zhengzhou, 450002, P.R. China;Network Engineering Department, Zhengzhou Information Science and, Technology Institute, P.O. Box 1001-770, Zhengzhou, 450002, P.R. China
Venue:
ACNS '07 Proceedings of the 5th international conference on Applied Cryptography and Network Security
Year:
2007

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Abstract

ID-based public key cryptosystem can be a good alternative for certificate-based public key setting, especially when efficient key management and moderate security are required. Certified e-mail protocols provide for fair exchange in which the intended recipient gets the e-mail content if and only if the mail originator receives an irrefutable receipt for the e-mail. In this paper we present an optimistic certified e-mail protocol in an ID-based setting. The protocol makes use of verifiable encryption of ID-based digital signatures as building blocks. We offer arguments for the fairness, efficiency, and provable security of our new protocol.