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:
Sep. 08, 2009
Filed:
Sep. 08, 2003
Marcus Bodensjö, Malmö, SE;
Harro Osthoff, Nürnburg, DE;
Patrik Schalin, Lund, SE;
Bernard Smeets, Dalby, SE;
Marcus Bodensjö, Malmö, SE;
Harro Osthoff, Nürnburg, DE;
Patrik Schalin, Lund, SE;
Bernard Smeets, Dalby, SE;
Telefonaktiebolaget L M Ericsson (Publ.), Stockholm, SE;
Abstract
A method of protecting an electronic device from unauthorized reprogramming, the electronic device comprising a data memory and a key memory, the method comprising loading into the key memory a predetermined public key of a cryptographic public key mechanism for verifying subsequent data items to be loaded into the data memory, the subsequent data items being signed with a corresponding private key; characterized in that the method further comprises setting a permanent identifier in the electronic device, the permanent identifier including an identifier identifying an entity authorized to reprogram the electronic device and an indicator identifying a selected one of a number of categories of public keys.