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| | Proceedings of the Abstract - 3rd USENIX Workshop on Electronic Commerce, 1998 |
 | | At the end of this protocol, Alice and the Bank should have some common new sequence number, and either they should agree on what has happened, or there will be some kind of investigation going on, and Alice should know the basic kind of problem and what to do next. |
 | | In this protocol, Alice makes a payment to Carol by sending Carol a "draft." That is, a timestamped, digitally signed authorization for the bank to move $X from Alice's account into Carol's. |
 | | Alice must perform a signature, and Carol must perform two verifications (though she may want to maintain lists of valid certificates, so she doesn't perform the certificate verification more often than necessary). |
| www.usenix.org /event/ec98/full_papers/schneier/schneier_html/schneier.html (3425 words) |
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