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In order to get the highest level protection in widevine (the numbering is confusing) the decryption code and secure media path all need to be provisioned by th
by yaur 7y ago
In order to get the highest level protection in widevine (the numbering is confusing) the decryption code and secure media path all need to be provisioned by the OEM. In otherwords the “other people” running code in the Secure Enclave is the device manufacturer. If you don’t trust them you are already sunk.
- vbezhenar 7y agoWhat I don't understand: with highest level protection does HDMI sends encrypted stream which is supposed to be decrypted by chip in display (which should support DRM, of course) or decoding happens in PC and HDMI carried decoded signal? Because if latter is the case, it should be more or less trivial to just save stream from HDMI, so those protections mean nothing and trivially by-passed by available hardware.
- Crespyl 7y agoUsually these systems require HDCP support, which theoretically allows verification of the whole chain, PC to HDMI cable to display; any "unapproved" devices in the middle would be detected and prevent display. In practice, the HDCP master key was leaked years ago and it's pretty straight forward to get an HDCP stripper device and a capture card.
- deleted 7y ago[deleted]