Fair electronic exchange with virtual trusted parties
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Micali_fair_electronic_exchange.pdf
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956.52 KB
Format
Adobe PDF
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040e47a2625b93d2705e4f236666d145
Author(s)
Micali, Silvio
Date Issued
n.d.
Publisher
© Massachusetts Institute of Technology
Citation
Micali, S. (n.d). Fair electronic exchange with virtual trusted parties (ECIR Working Paper No. n.d.-1). MIT Political Science Department.
Version
Author's final manuscript.
Series/Report no.
ECIR Working Paper No. n.d.-1
Abstract
Assume each of two parties has something the other wants. Then, a Fair exchange is an electronic protocol guaranteeing that either both parties get what they want, or none of them does. Protocols relying on traditional trusted parties easily guarantee such exchanges, but are inefficient and expensive, because a trusted party must be part of (thus be paid for) every execution.
We put forward a new class of protocols, relying on virtual trusted parties (a new type of trusted party), and show that they provide Fair exchange more efficiently than before, and at a fraction of the cost. In particular, we provide attractive protocols for Fair certified e-mail and contract signing.
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