Method of and apparatus for generating and authenticating postal indicia
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United States of America Patent
Stats
-
Oct 23, 2001
Grant Date -
N/A
app pub date -
Feb 27, 1998
filing date -
Feb 28, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Methods and apparatus for authentication of postage indicia are disclosed. A secret key is read from store and modified in dependence upon postage data to be printed in a postage indicium. The modified key is then utilized to generate an authentication code dependent upon the postage data to be printed. Authentication of the indicium is effected by reading the authentication code and postage data from the printed indicium and repeating the process of generating an authentication code. The generated authentication code is compared with the authentication code read from the indicium. A control code based on a value in an accounting register may be included in the indicium. The value may be a value of postage dispensed in a determined expired period.
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