The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 10, 2004
Filed:
Oct. 15, 2002
Cheh Goh, Bristol, GB;
Marco Casassa Mont, Bristol, GB;
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
A method of printing a token by printer ( ), in which the printer ( ) includes a digital identification device ( ) configured to generate a series of distinct print job counter numbers and to provide a public key of a cryptographic public key/private key pair. The method includes the steps of sending a printer generated print job counter number and an encryption key to a token issuer ( ) the token issuer ( ) sending to the printer ( ) a message encrypted by the encryption key, the message including the print job counter number and information representative of the token ( ) to be printed and the printer ( ) decrypting the encrypted message and printing the token using the information representative of the token ( ) if the print job counter number is valid.