Authentication system between a card reader and a pay card exchanging data
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United States of America Patent
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-
Sep 16, 1986
Grant Date -
N/A
app pub date -
Jul 18, 1984
filing date -
Jul 29, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A reciprocal authentication system between two groups of electronic units which can be interconnected for the exchange of data. The system periodically supplies a variable access key for the encrypting of confidential exchanges.
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