Portable pin card
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 23, 1993
Issued Date -
N/A
app pub date -
Sep 19, 1991
filing date -
Jan 16, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A portable Personal Identification Card allows a cardholder to enter a PIN code into his card at a location remote from an authorization terminal. In an alternate embodiment, a PIN code may be entered at the authorization terminal. The authorization terminal reads the cardholder's account number from the PIN card. The account number is transmitted to a central computer which uses this number to index into memory to find a personal identification number and encryption parameters. The central computer transmits a pseudo-random number to the PIN Card. Both the PIN Card and the central computer perform an encryption of a function of the corresponding personal identification number and pseudo-random number to derive a CGIPIN (Computer Generated Image of the PIN). If the CGIPIN transmitted from the PIN card matches the CGIPIN of the central computer, access is authorized.
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