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:
Jan. 03, 2017
Filed:
Dec. 09, 2015
Lexmark International, Inc., Lexington, KY (US);
Christopher Alan Adkins, Lexington, KY (US);
Timothy John Rademacher, Lexington, KY (US);
Lexmark International, Inc., Lexington, KY (US);
Abstract
Slave device circuitry, including processing circuitry which is configured to determine a new session identification value; determine a seed value using a secure hash algorithm on a previously determined seed value; determine a slave number from using the secure hash algorithm on the new session identification value, the determined seed value, and a serial number of the slave device associated with the slave device circuitry; receive a host number from the host imaging apparatus and calculate a session key using a hash-based algorithm computation on the host number, the slave number, the new session identification value, and a stored encryption key. The session key has a first portion for performing encryption and decryption operations on data to be transmitted and data received by the slave device, respectively, and a second portion for generating a new address value of the slave device for communicating with the host.