Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2004-12-13
2010-06-29
Laforgia, Christian (Department: 2439)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C709S206000, C709S207000
Reexamination Certificate
active
07747860
ABSTRACT:
A sending device prepares a key for each electronic message sent by the device by applying an algorithm to specified data in the message and then incorporates the key in the message. A receiving device, upon receipt of an electronic message, locates the incorporated key and the data from which a sending device practicing the invention would have prepared it. The receiving device communicates a confirmation request to the purported sending device which contains the key and the data for its preparation. The sending device receives the confirmation messages and prepares a comparison key by applying the algorithm to the data in the confirmation request. The sending device replies to the confirmation request confirming that the sending device sent the message if the comparison key matches the key in the confirmation request and otherwise responds with a denial.
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Cunningham Brian
Kim Leslie J.
Laforgia Christian
Message Level LLC
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