Patent ID: 8341616
Filing Date: 2012-12-25
Classification: G06F

Abstract:
1. A method of updating an original version of a unit of active content, comprising: receiving, by an updating entity, a new version of program code for replacing at least a portion of said original version of said unit of active content, wherein said original version of said unit of active content contains a digital signature generated using a private encryption key belonging to said originally signing user; determining, by said updating entity, the identity of said originally signing user from said digital signature contained in said original version of said unit of active content; storing, by said updating entity, an indication of said identity of said originally signing user in a field within a new version of said unit of active content, wherein said field associates said new version of said unit of active content with at least one privilege associated with said originally signing user; writing, by said updating entity, said new version of program code into said new version of said unit of active content; and digitally signing, by said updating entity, said new version of said unit of active content, including generating a digital signature using a private encryption key belonging to said updating entity.