Data processing: financial – business practice – management – or co – Business processing using cryptography – Secure transaction
Reexamination Certificate
2011-08-16
2011-08-16
Fischer, Andrew J. (Department: 3621)
Data processing: financial, business practice, management, or co
Business processing using cryptography
Secure transaction
C705S064000, C705S078000
Reexamination Certificate
active
08001054
ABSTRACT:
A random number generating algorithm is seeded with an unpredictable number. The seed value is computed by subjecting variable data to a Secure Hashing Algorithm, and truncating the right most, or left most, 16 bytes from the message digest generated. The algorithm generates the unpredictable number by using the seed value as a counter value in the random number generator, and performing a data encryption standard operation. In one exemplary embodiment, the unpredictable number is modified to a predetermined maximum unpredictable number value as determined by the sender and receiver of the unpredictable number.
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Peart Lee J
Saunders Peter D
American Express Travel Related Services Company Inc.
Coppola Jacob C.
Fischer Andrew J.
Snell & Wilmer L.L.P.
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