Abstract
Certified E-mail can be divided into an on-line protocol an optimistic protocol by the usage of a third party. We call this party “Delivery Authority”. An on-line protocol can realize send-and-forget. There is a drawback, however, that the cost to Delivery Authority becomes large, because users surely access Delivery Authority in the middle of a protocol. On the other hand, when an optimistic protocol is used, there is little cost to Delivery Authority because users access Delivery Authority only in case a problem occurs, however, send-and-forget is unrealizable. Each protocol may be inconvenient depending on the situation. In the conventional system, however, a sender selects which protocol to use depending on a sender’s convenience. In this paper, we propose the new system having both our proposed on-line protocol and optimistic protocol a receiver can choose freely. By this mechanism, a receiver can choose the usage of Delivery Authority freely according to that time after taking the necessity and the situation of Delivery Authority and the sender into consideration.
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Imamoto, K., Sakurai, K. (2002). A Certified E-mail System with Receiver’s Selective Usage of Delivery Authority. In: Menezes, A., Sarkar, P. (eds) Progress in Cryptology — INDOCRYPT 2002. INDOCRYPT 2002. Lecture Notes in Computer Science, vol 2551. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-36231-2_26
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DOI: https://doi.org/10.1007/3-540-36231-2_26
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