Printing – Selective or progressive – Rotary machines
Patent
1997-12-09
2000-03-28
Hilten, John
Printing
Selective or progressive
Rotary machines
400103, 400104, B41L 4746
Patent
active
060417048
ABSTRACT:
In a method for a digitally printing postage meter machine and for generating and checking a security imprint, critical franking information together with a signature are printed on a mail piece in the machine-readable area of the franking format. A print head having a standard printing width can be utilized for the imprint, which is human-readable and also reliably machine-readable, because the machine-readable information set to be printed is reduced by a modified public key method, with the private write key and the algorithm for encryption being stored at the postage meter machine site in a security device. The public read key and its certificate can be taken from a data base at the postal site, allocated to the postage meter machine identifier. The public key method modified for postage meter machines makes use of a simple key generation and encryption of the message at the postage meter machine site and a simple decrypting of the message at the postal site.
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Francotyp-Postalia AG & Co.
Hilten John
Nolan, Jr. Charles H.
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