Method and system for cryptographically authenticating a...

Details Method and system for cryptographically authenticating a... Method and system for cryptographically authenticating a...

2005-06-14

2005-06-14

Barrón, Jr., Gilberto (Department: 2132)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C713S155000, C713S156000, C713S168000, C713S176000

Reexamination Certificate

active

06907528

ABSTRACT:
A method for authenticating a printed document is described. A document producer sends information to be included in a document to an authentication authority. The authentication authority cryptographically generates an authentication code from this information, and sends the authentication code back to the document producer. The document producer then prints the document, including both the information and the authentication code, and a bar code representing the authentication code. A document checker scans in the bar code, and cryptographically checks the authentication code against the information in the document.

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