Data processing: financial – business practice – management – or co – Business processing using cryptography – Postage metering system
Reexamination Certificate
2005-03-15
2005-03-15
Backer, Firmin (Department: 3621)
Data processing: financial, business practice, management, or co
Business processing using cryptography
Postage metering system
C705S050000, C705S064000
Reexamination Certificate
active
06868407
ABSTRACT:
A cryptographic method for providing a level of security by a postage security device, which generates a digital token using a cryptographic key. When it is required to make a key change in order to improve the level of security, the postage security devices replaces the cryptographic key with a new cryptographic key, wherein the new cryptographic key has a key length that is equal to or greater than the replaced cryptographic key. The new cryptographic key can be generated by the postage security device based on a given key length, or selected from a plurality of replacement keys stored in a storage device.
REFERENCES:
patent: 5144664 (1992-09-01), Esserman et al.
patent: 5341427 (1994-08-01), Hardy et al.
patent: 5416841 (1995-05-01), Merrick
patent: 5805701 (1998-09-01), Ryan, Jr.
patent: 5878136 (1999-03-01), Kim et al.
patent: 6005945 (1999-12-01), Whitehouse
patent: 6044350 (2000-03-01), Weiant, Jr. et al.
patent: 6058384 (2000-05-01), Pierce et al.
patent: 6240187 (2001-05-01), Lewis
patent: 6247921 (2001-06-01), Helt
patent: 6411716 (2002-06-01), Brickell
patent: 6424954 (2002-07-01), Leon
patent: 6466921 (2002-10-01), Cordery et al.
patent: 6526391 (2003-02-01), Cordery et al.
patent: 6546377 (2003-04-01), Gravell et al.
USPS, Information Based Indicia Program (IBIP), “Performance Criterial for Information Based Indicia and security Architecture for Open IBI Postage Evendencing Systems”,Feb. 23, 2000.
USPS (Draft), Information Based Indicia Program (IBIP) Open System Postal Security Device (PSD) Specification, Jul. 23, 1997.
Backer Firmin
Chaclas Angelo N.
Macdonald George M.
Malandra Charles R.
Pitney Bowes Inc.
LandOfFree
Postage security device having cryptographic keys with a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Postage security device having cryptographic keys with a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Postage security device having cryptographic keys with a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3386456