Method and apparatus for secure PIN entry
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United States of America Patent
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-
Aug 17, 1999
Issued Date -
N/A
app pub date -
May 30, 1997
filing date -
Dec 14, 1994
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method and apparatus for secure entry and authentication of a multi-digit personal identification number (PIN) is described. An authenticator generates a random number, and provides that number, or a function thereof, to a user. The user is prompted to encode each digit of the PIN number, one digit at a time, by performing a mathematical operation on the digit using the number provided by the authenticator. The encoded PIN digit is provided to the authenticator which reverses the steps performed by the user to regenerate and verify the user's PIN. The user is prompted to encode subsequent digits of the PIN only after (1) a previous digit is encoded, (2) the encoded digit is provided to an input device for the authenticator, (3) and a new random number is generated and that random number, or a function thereeof, is provided to the user for encoding a subsequent PIN digit.
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