Security and authentication of postage indicia

Details Security and authentication of postage indicia Security and authentication of postage indicia

2001-08-23

2010-10-05

Hewitt, II, Calvin Loyd (Department: 3685)

Data processing: financial, business practice, management, or co

Business processing using cryptography

Postage metering system

C705S051000, C705S052000, C705S053000, C705S054000, C705S055000, C705S056000, C705S057000, C705S058000, C705S059000, C705S060000, C705S061000, C705S063000, C705S064000, C705S065000

Reexamination Certificate

active

07809649

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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