Method and apparatus for secure pin entry
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United States of America Patent
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-
May 19, 1998
Grant Date -
N/A
app pub date -
Dec 14, 1994
filing date -
Dec 14, 1994
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method for sequentially encrypting the digits of a personal identification number, and an apparatus for practicing the method, are disclosed. According to the method, a random number is generated and supplied to a user requesting access to a system. The user encrypts a digit of his personal identification number by performing a function on the random number and the digit and then provides the encrypted digit to a verification system. A second random number is then generated, provided to the user, applied to encrypt another digit of the user's personal identification number and then input to the verification system. The dialogue between verification system and the user continues, digit by digit, until each digit of the personal identification number has been provided to the verification system in encrypted form. The verification system then compares the encrypted input with the user's personal identification number accessed from memory.
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