Data processing: financial – business practice – management – or co – Business processing using cryptography
Reexamination Certificate
2005-02-01
2005-02-01
Elisca, Pierre E. (Department: 3621)
Data processing: financial, business practice, management, or co
Business processing using cryptography
C713S162000, C713S152000, C713S171000, C380S228000, C380S272000, C380S239000
Reexamination Certificate
active
06850909
ABSTRACT:
The present invention permits a user to conduct remote transactions without a network while using an untrusted computing device, such as a hand-held personal digital assistant or a laptop computer. The computing device is augmented with a smartcard reader, and the user obtains a smartcard and connects it to the device. This design can be used by an untrusted user to perform financial transactions, such as placing bets on the outcome of a probabilistic computation. Protocols are presented for adding (purchasing) or removing (selling) value on the smartcard, again without requiring a network connection. Using the instant protocols, neither the user nor the entity issuing the smartcards can benefit from cheating.
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IBM Technical Disclosure Bulletin, Jan. 1998, US Flexible Interface for Adding/Changing Imbedded CryptoGraphics support.
Aiello William A.
Rubin Aviel D.
Strauss Martin J.
AT&T Corp.
Elisca Pierre E.
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