User authentication method and apparatus

Details User authentication method and apparatus User authentication method and apparatus

1994-06-24

1997-09-16

Gregory, Bernarr E.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 4, 380 23, 380 49, 34082531, 34082534, 235380, H04L 932, H04L 900

Patent

active

056688768

ABSTRACT:
Authorization for a user to use a service is provided by a modified pager which calculates a unique response code to a transmitted challenge code based on the challenge code, an input personal identification number, and an internal key. The response code is input to a simple terminal, such as a telephone and if the unique response code is acceptable, the user may access the desired service, such as cashless transactions or long distance phone service.

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