Data processing: financial – business practice – management – or co – Business processing using cryptography – Postage metering system
Reexamination Certificate
2005-09-06
2005-09-06
Trammell, James P. (Department: 3621)
Data processing: financial, business practice, management, or co
Business processing using cryptography
Postage metering system
C705S060000, C705S401000, C705S405000, C705S408000, C705S410000, C380S001000, C380S029000, C380S029000, C380S028000, C380S044000, C380S051000, C380S054000
Reexamination Certificate
active
06941284
ABSTRACT:
A postage meter includes a vault that accounts for postage dispensed by the postage meter; and a printhead module having a printhead for printing the postage dispensed; a smart card chip having a ROM having software code stored therein; an EEPROM having an encrypted key and executable code stored therein, a CPU; a RAM; and a flash memory having an encrypted pointer data file stored therein. During power-up of the postage meter the encrypted pointer data file is read from the flash memory into the RAM by the CPU, the CPU uses the executable code to decrypt the encrypted pointer data file to obtain from the software code components parts of a decryption key and to assemble in the ram the decryption key from the component parts, the CPU uses the assembled decryption key and the executable code to decrypt the encrypted cryptographic key, and the CPU stores the decrypted cryptographic key in a secure area of the EEPROM, erases the decryption key and the encrypted pointer data file from the RAM, erases the encrypted cryptographic key and executable code from the EEPROM, and erases the pointer data file from the flash memory.
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DeFilippo Craig J.
Gargiulo Joseph L.
Chaclas Angelo N.
Greene Daniel L.
Pitney Bowes Inc.
Shapiro Steven J.
Trammell James P.
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