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:
Oct. 17, 2017
Filed:
Sep. 19, 2012
Nxp B.v., Eindhoven, NL;
Vincent Cedric Colnot, Uccle, BE;
NXP B.V., Eindhoven, NL;
Abstract
Embodiments of a method are disclosed. One embodiment is a method for securely updating firmware in a computing device, in which the computing device includes a host processor and a non-volatile memory. The method involves receiving a double-encrypted firmware image from an external firmware source, wherein the double-encrypted firmware image is generated from firmware that is encrypted a first time using a first crypto-key and then encrypted a second time using a second crypto-key. The method also involves receiving the second crypto-key from an external key source, decrypting the double-encrypted firmware image using the second crypto-key to produce an encrypted firmware image, storing the encrypted firmware image in the non-volatile memory of the computing device, reading the encrypted firmware image from the non-volatile memory of the computing device, decrypting the encrypted firmware image using the first crypto-key, and executing the firmware on the computing device.