Franking method and mail transport system with central...

Data processing: financial – business practice – management – or co – Business processing using cryptography – Postage metering system

Reexamination Certificate

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C705S060000, C705S408000

Reexamination Certificate

active

08046304

ABSTRACT:
In a franking method and a mail transport system, a franking image is calculated before generation thereof on a mail piece. The franking image includes a franking image key, and for each new franking image, the franking image key therefor is derived from a predecessor franking image key according to a first crypto-algorithm. An integrity check code is also generated based on the new franking image key, a key generation number, an apparatus identifier of the franking device, and a second crypto-algorithm. The franking image includes at least the device identifier, the key generation number and the integrity check code. Upon transport of the mail piece to a sorting center, the franking image is scanned and fees for billing are generated based thereon.

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