Data processing: financial – business practice – management – or co – Business processing using cryptography
Reexamination Certificate
2007-09-18
2007-09-18
Fischer, Andrew J. (Department: 3621)
Data processing: financial, business practice, management, or co
Business processing using cryptography
C705S060000, C705S401000, C705S408000, C705S410000, C382S101000
Reexamination Certificate
active
10246040
ABSTRACT:
A mailing machine that optimizes throughput by reducing the amount of time necessary for the PSD to generate the digital signature and indicium for each mail piece is provided. The debit operation performed by the PSD, i.e., adjusting the PSD registers, is separated into three different sections, a pre-debit operation, a perform debit operation, and a complete debit operation. In addition, the calculation of the digital signature can optionally be pre-computed, or, alternatively, computed in stages, i.e., partial signature calculation. Utilizing this granularity, the cryptographic operations associated with generating the digital signature can be shifted between the three debit operations such that the execution time of the time critical portion of the debit operation (perform debit) can be optimized to meet the performance requirements of the mailing machine in which the PSD is deployed.
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Athens G. Thomas
Cordery Robert A.
Hurd John A.
Parkos Maria P.
Ratzenberger, Jr. Roger
Agwumezie Charlie C. L.
Chaclas Angelo N.
Fischer Andrew J.
Lemm Brian A.
Pitney Bowes Inc.
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