Using Digital Signatures as Evidence of Authorizationsin Electronic Credit - Card
نویسنده
چکیده
Credit-card payment protocols such as iKP and SET use digital signatures to authenticate messages and authorize transactions. It is assumed that these digital signatures make the parties' authorizations non-repudiable, i.e., provable to a third-party veriier. In this paper, we deene a set of statements which participants in a payment may want to prove. We then investigate which of these statements can be proved with the digital signatures within iKP and SET, and make some general comments about requirements for provability in payment protocols.
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