Method and apparatus for personal identification
March 18, 2011. 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.Patent References 3764742 3806874 3886451 3900867 Transmit phase control system of synchronization burst for SDMA/TDMA satellite communication system Asynchronous digital locking system Method of and means for processing an audio frequency signal to conceal intelligility Method and apparatus for ciphering and deciphering messages Multi-mode digital enciphering system Method and apparatus for position determination InventorAssigneeApplicationNo. 670705 filed on 03/18/1991US Classes:713/184, PIN/password generator device235/379, Banking systems235/380, Credit or identification card systems235/382, Permitting access340/5.85PasswordExaminersPrimary: Gregory, Bernarr E.Attorney, Agent or FirmInternational ClassH04L 009/32AbstractA 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.Other References
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