Method of limiting key usage in a postage metering system...

Details Method of limiting key usage in a postage metering system... Method of limiting key usage in a postage metering system...

2005-08-30

2005-08-30

Elisca, Pierre E. (Department: 3621)

Data processing: financial, business practice, management, or co

For cost/price

Postage meter system

C705S410000, C705S061000, C705S401000

Reexamination Certificate

active

06938023

ABSTRACT:
A method for requiring that a key used in a cryptographic apparatus be changed includes the steps of: storing a constraint value for a non-time parameter of the cryptographic apparatus, the non-time parameter being related to the operation of the cryptographic apparatus; and requiring the key to be changed when an actual value of the non-time parameter is not within a range defined by the constraint value.

REFERENCES:
patent: 5186498 (1993-02-01), Dietrich
patent: 5508933 (1996-04-01), Abumehdi
patent: 5666421 (1997-09-01), Pastor et al.
patent: 5687237 (1997-11-01), Naclerio
patent: 5708710 (1998-01-01), Duda
patent: 5819240 (1998-10-01), Kara
patent: 5978781 (1999-11-01), Sansone
patent: 6041317 (2000-03-01), Brookner
patent: 6064989 (2000-05-01), Cordery et al.
patent: 6144950 (2000-11-01), Davies et al.
patent: 6157919 (2000-12-01), Cordery et al.
patent: 0649120 (1995-04-01), None
patent: 0811955 (1997-12-01), None
patent: 408273011 (1996-10-01), None
StampMaster, Announces U.S. Postal Service Approval for Beto of New Internet Postage Solution, Aug. 25, 1998.
Website of ebusiness dot com, Sep. 1998.
Website of stamps dot com, Aug. 1998.
Website of jya dot com, Oct. 1996.
Website of cl.cam.ac.uk, Nov. 1996.

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