05737418 is referenced by 97 patents and cites 35 patents.

A method for encrypting bill validation data generated by a bill validator is disclosed. Such data includes an inserted bill's denomination and country of origin as determined by sensors in the bill validator. Once such information is obtained, it is encrypted by combination with an encryption key selected from a table of such keys. The encrypted data is then communicated to a machine associated with the bill validator such as a gaming or vending machine. Upon receipt, the machine decrypts the data to obtain the original bill validation data. If the machine finds the denomination and issuing country of the inserted bill to be acceptable, the machine instructs the bill validator to accept the bill and store it in a bill repository.

Title
Encryption of bill validation data
Application Number
8/453269
Publication Number
5737418
Application Date
May 30, 1995
Publication Date
April 7, 1998
Inventor
James P Hunt
Reno
NV, US
Ali M Saffari
Reno
NV, US
Agent
Hickman Beyer & Weaver
Assignee
International Game Technology
NV, US
IPC
G07D 7/00
G06F 7/04
H04K 1/02
H04K 1/00
H04L 9/00
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