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. 31, 2012
Filed:
Jul. 23, 2007
Mark R. Murray, Atlanta, GA (US);
Mark R. Murray, Atlanta, GA (US);
Other;
Abstract
To prevent poaching of an Internet Protocol (IP) set top box (STB) asset or similar network computing device from one system operator to another, code executing in the IP STB not only authenticates downloaded software images using a public key provided in a serial-number assigned digital certificate, but also confirms that the serial number appears on a signed whitelist, or does not appear on a signed blacklist. The code executing in the STB further preferably enforces a rule that only the authority that signed the already-loaded whitelist/blacklist may replace it with a new list. Such a 'sticky whitelist/blacklist' ensures that if the STB boots or resets in a new network, the existing authentication list will not be replaced by a list that is valid for a new or different network, and, as a result, that new software code images will not be authenticated.