Patent ID: 8566613
Filing Date: 2013-10-22
Classification: G06F

Abstract:
1. A computer-implemented method comprising: obtaining a signed firmware image, the signed firmware image comprising at least a first code module signed by a first code owner and an access control list, wherein the access control list authorizes the first code owner to update the first code module; obtaining an updated first code module, the updated first code module comprising updated code for the first code module and an updated access control list delegating authority to update the first code module from the first code owner to a second code owner; verifying that the updated first code module is signed by the second code owner and that the second code owner is authorized to update based on, at least in part, the updated access control list; and updating the signed firmware image with the updated first code module in response to verifying that the updated first code module is signed by the second code owner and that the second code owner is authorized to update the first code module.