Method and apparatus for allowing software access to navigational data in a decrypted media stream while protecting stream payloads

摘要

A method, apparatus and system enabling software access to navigational data in a decrypted media stream while protecting stream payloads. In one embodiment, a filter may route an encrypted content stream and associated information to a secure partition having a trusted computing component for decryption. Upon decryption, the trusted computing component may store the decrypted payload of the content in a secure storage location accessible to the trusted computing component. Thereafter, the decrypted navigational header information of the content may be used to navigate to the decrypted content via a trusted component such as a trusted rendering unit in the secure partition.

主权项

1. A method, comprising:
receiving, by a source filter of a computing device, a monolithically encrypted media stream; identifying, by the source filter, a media type of the monolithically encrypted media stream and header parameters associated with the media type; and providing, by the source filter, to a trusted decryption module, the monolithically encrypted media stream with a header-match pattern and a header-match mask, to decrypt the media stream, wherein the header-match pattern contains a description of an expected pattern of bits in a header of the media stream, and wherein the header-match mask contains a pattern of bits to be ignored if present in the header of the media stream.