Method and apparatus for personal identification

Patent 5367572 Issued on November 22, 1994. Estimated Expiration Date:

July 31, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

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Inventor

Weiss, Kenneth P.

Application

No. 923085 filed on 07/31/1992

US Classes:

713/184, PIN/password generator device235/379, Banking systems235/380, Credit or identification card systems235/382, Permitting access340/5.54, Password340/5.85, Password705/72Verifying PIN

Examiners

Primary: Gregory, Bernarr E.

International Class

H04L 009/32

Abstract

A method and apparatus for providing improved security for a personal identification number (PIN) in a personal identification and verification system of the type wherein a time dependent nonpredictable code is generated at a device in the possession of the individual, which code is unique to the individual and this code is communicated to, and compared with a nonpredictable code generated at a central verification computer. In this system, the PIN is mixed with the nonpredictable code before transmission of these values to the central verification computer. A nonsecret code is previously transmitted to the central verification computer and is used to retrieve the PIN and the appropriate nonpredictable code for the user. These values are used to strip the PIN from the transmitted nonpredictable code and the stripped PIN and remaining nonpredictable code are compared with the corresponding retrieved values in order to determine verification.