Patent ID: 7779401
Filing Date: 2010-08-17
Classification: G06F

Abstract:
1. A method for generating a reverse patch for reversing a forward patch on an electronic device, wherein the forward patch generates a new binary image from an old binary image, the method comprising the steps of: generating an index file at a server, the index file identifying regions of similarity between the old binary image and the new binary image for use in obtaining at least a portion of the old binary image from the new binary image; transmitting the forward patch and the index file from the server to the electronic device; applying the forward patch to the old binary image to create the new binary image at the electronic device; and generating the reverse patch from the new binary image, the old binary image, and the index file at the electronic device; wherein said steps of generating the index file, applying the forward patch, and generating the reverse patch are performed on a sector-by-sector basis.