Patent ID: 8571209
Filing Date: 2013-10-29
Classification: H04L,H04N

Abstract:
1. A method of obtaining forensic information for an anonymous attack of digital content without variations in a broadcast encryption system, comprising: receiving, by a media device, digital content, a unified media key block, and a recording key table, said device including a processor and being configured to record digital content on recordable media; calculating, by said device, a set of recording keys from said recording key table using a media key variant from said unified media key block; generating, by said device, a title key; encrypting, by said device, said digital content with said generated title key; encrypting, by said device, said generated title key with each one of said calculated recording keys; and adding, by said device, a header including said encrypted title key to said encrypted digital content; and storing, by said device, said encrypted digital content with said header on recordable media.