TENeT: A Framework for Distributed Smartcards

Terada, Masayuki; Mori, Kensaku; Ishii, Kazuhiko; Hongo, Satoshi; Usaka, Tomonori; Koshizuka, Noboru; Satoh, Ken

doi:10.1007/978-3-540-32004-3_2

Cited by 1 publication

(1 citation statement)

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“…An optimistic fair exchange protocol for electronic vouchers, which is slightly more complex than the proposed protocol (requires four messages and almost the same cryptographic calculations), performs an exchange in less than two seconds when implemented on mid-range smartcards. [16] This implies that the proposed NBAC protocol can be performed in the same or less time.…”

Section: Feasibilitymentioning

confidence: 99%

An Optimistic NBAC-Based Fair Exchange Method for Arbitrary Items

Terada

Mori

Hongo

2006

Smart Card Research and Advanced Applications

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Fair exchange protocols are important in realizing safe electronic commerce. In particular, optimistic fair exchange protocols, which involve a trusted third party only when mutual communication between exchanging parties fails, are the most promising development because of their efficiency. Unfortunately, however, existing optimistic protocols place restrictions on the items that can be exchanged, i.e., at least one item must be a "strongly generatable" item such as a digital signature. Without this requirement, only weak fairness that requires (expensive) external dispute resolution processes (e.g. trials in court) after exchange failure can be assured. This paper proposes a novel fair exchange method that enables parties to fairly exchange arbitrary items in an optimistic manner. This is achieved by realizing an optimistic non-blocking atomic commitment (NBAC) protocol between two smartcards and adapting the known result that fair exchange can be reduced to NBAC among trusted processes.

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Section: Feasibilitymentioning

confidence: 99%