Personal identification number security system incorporating a t

Details Personal identification number security system incorporating a t Personal identification number security system incorporating a t

1995-11-30

1998-02-24

Chan, Wing F.

Telephonic communications

Telephone line or system combined with diverse electrical...

Having transmission of a digital message signal over a...

382115, H04M 1100, G06K 962

Patent

active

057217653

ABSTRACT:
The security system includes a time dimension in an alpha-numeric personal identification number (PIN) security system to enhance its security yet maintain the familiar and simple to use PIN system. The alpha-numeric digits comprising the PIN are separated into two or more digit groups that must be entered into the system according to a predefined time sequence in order to positively identify the user and provide security clearance. The time sequence can include time delays between the entry of digit groups or time periods during which the digit groups must be entered.

REFERENCES:
patent: 4621334 (1986-11-01), Garcia
patent: 4761808 (1988-08-01), Howard
patent: 4805222 (1989-02-01), Young et al.
patent: 4998279 (1991-03-01), Weiss
patent: 5557686 (1996-09-01), Brown et al.

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