Time code telephone security access system

Details Time code telephone security access system Time code telephone security access system

1987-03-18

1988-08-02

Schreyer, Stafford D.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

379112, 379 97, H04M 1100

Patent

active

047618086

ABSTRACT:
The present invention comprises a novel means of controlling access to long distance telephone services or other information processing systems through the use of time dependent user ID numbers. The ID number of the present invention contains a fixed portion, and a changing portion that changes over time in a predetermined manner. Unless the fixed and changing portions of an incoming ID number received from a user attempting to gain access to the secured system are both correct, access is denied. The invention also includes a multi-use detector that determines if a valid ID number is used simultaneously by two different users.

REFERENCES:
patent: 4546213 (1985-08-01), Dick
patent: 4626623 (1986-12-01), La Haye
Automated Patent System, Database Specification Access Control, May 11, 1985, p. 3-2 of APS-DPS-0601.01.
Automated Patent System, Program Specification Access Control, May 1, 1985, APS-CPS-0601.01, pp. 4-74, 4-75.

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