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J. A. Onieva, J. Zhou, J. Lopez, and M. Carbonell, "Agent-mediated non-repudiation protocols",
Electronic Commerce Research and Applications, vol. 3, no. 2, Elsevier, pp. 152-162, 2004. More..


Non-repudiation is a security service that provides cryptographic evidence to support the settlement of disputes in electronic commerce. In commercial transactions, an intermediary (or agent) might be involved to help transacting parties to conduct their business. Nevertheless, such an intermediary may not be fully trusted. In this paper, we propose agent-mediated non-repudiation protocols and analyze their security requirements. We first present a simple scenario with only one recipient, followed by a more complicated framework where multiple recipients are involved and collusion between them is possible. We also identify applications that could take advantage of these agent-mediated non-repudiation protocols.

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