Untraceable electronic mail, return addresses, and digital pseudonyms
Communications of the ACM
A Multi-party Optimistic Non-repudiation Protocol
ICISC '00 Proceedings of the Third International Conference on Information Security and Cryptology
ESORICS '96 Proceedings of the 4th European Symposium on Research in Computer Security: Computer Security
Selective Receipt in Certified E-mail
INDOCRYPT '01 Proceedings of the Second International Conference on Cryptology in India: Progress in Cryptology
A Multi-Party Non-Repudiation Protocol
Proceedings of the IFIP TC11 Fifteenth Annual Working Conference on Information Security for Global Information Infrastructures
Proceedings of the First International Workshop on Information Hiding
ACSAC '98 Proceedings of the 14th Annual Computer Security Applications Conference
Simple and fast optimistic protocols for fair electronic exchange
Proceedings of the twenty-second annual symposium on Principles of distributed computing
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Kremer and Markowitch introduced in [10] a new property for certified email protocols called no author-based selective receipt, and proposed two new protocols respecting it. In this paper we show that these protocols implicitly require the sender of the email to trust the trusted third party to assure this property. We propose a new protocol in which this trusted third party has only to be trusted to assure fairness and timeliness, like in most other exchange protocols. Unfortunately, unlike [10], our protocol does not guarantee the delivery of a non-repudiation of origin evidence to the recipient. We prove that this is impossible to achieve without a fully trusted third party.