Data processing: financial – business practice – management – or co – Business processing using cryptography – Usage protection of distributed data files
Reexamination Certificate
2005-08-16
2005-08-16
Trammell, James P. (Department: 3621)
Data processing: financial, business practice, management, or co
Business processing using cryptography
Usage protection of distributed data files
C705S064000, C705S068000, C705S077000, C705S078000, C713S178000, C713S001000, C713S002000, C713S100000, C717S120000, C717S122000
Reexamination Certificate
active
06931381
ABSTRACT:
Systems and methods for producing a digitally-computed acknowledgment of a delegated download event are disclosed. An information owner, such as the issuer of a smart card, delegates an information download to a third party. The information is downloaded from the third party to an information device, such as a smart card. The computed acknowledgment is a digital “seal” or signature (depending upon the type of cryptographic algorithm used). The seal or signature is preferably a cryptogram generated by the information device using cryptographic keys resident on the information device itself. This acknowledgment is then made available to the information owner, who may then test the cryptogram to determine whether the third party successfully completed the software download.
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Abdi Kambiz
American Express Travel Related Services Company Inc.
Snell & Wilmer L.L.P.
Trammell James P.
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