Patent ID: 9147048
Filing Date: 2015-09-29
Classification: G06F,H04N

Abstract:
1. A method of importing a first content file, comprising a plurality of content parts, to a second content file, the method comprising: encrypting the content parts according to usage constraint information of the content parts, by utilizing one of an Advanced Encryption Standard (AES) cipher block chaining (CBC) method and a counter (CTS) method, wherein the content parts each have different usage constraint information and the usage constraint information comprises one of a copy control information and a broadcast flag; creating licenses for the content parts according to the usage constraint information; creating, using a computer processor, the second content file containing the content parts and the licenses, wherein the second content file is created after the first content file is imported, including in the licenses for content parts a usage rule for corresponding content and each license comprises a content ID and a content key of the corresponding content part, wherein the protection information comprises mapping information for at least one content part and an encryption parameter used for encrypting the content part,