System and method for authorizing access to an article distribution or service acquisition machine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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May 22, 1984
Grant Date -
N/A
app pub date -
Sep 15, 1981
filing date -
Sep 16, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A system and method for distribution of articles or services, especially adapted to be secure against use by unauthorized personel, receives first and second data carriers. Each data carrier includes a processor, data storage, and interfacing circuits. A random number generator feeds a random number to each of the data carriers which use a program to generate a resultant based on the random number, a secret code and an identification number. The secret code and identification number are stored in the data storage of each data carrier. The resultants are compared to determine if they are equal, in which case access is allowed.
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