Data processing: financial – business practice – management – or co – Business processing using cryptography – Postage metering system
Reexamination Certificate
2005-01-25
2005-01-25
Dixon, Thomas A. (Department: 3629)
Data processing: financial, business practice, management, or co
Business processing using cryptography
Postage metering system
Reexamination Certificate
active
06847951
ABSTRACT:
A method for certifying the public key of a digital postage meter using a public key encryption system by a certifying authority. A certifying station and a user station, or a digital postage meter, exchange information and the user station and downloads, or the meter derives, a public key from the exchanged information. The certifying station also publishes related information and its public key. A third party can derive the public key corresponding to the meter's private key by operating on the published information with the certifying station public key.
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Cordery Robert A.
Pintsov Leon A
Vanstone Scott A
Chaclas Angelo N.
Dixon Thomas A.
Pitney Bowes Inc.
Shapiro Steven J.
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