Method and system for conditional access through licensing of proprietary functions

摘要

There is provided a method for making playback of content secure and traceable on a playback device of a plurality of playback devices, each of the plurality of playback devices including a cryptographic function module (CFM). In one embodiment, the method comprises the steps of: accepting at a playback device a first input from a content licensing agency; In the device, generating a first output from the first input in accordance with a proprietary cryptographic function using a CFM, the first output being required to enable reproduction of the content by the player, Is one of a family of proprietary cryptographic functions executable by the CFM of each of a plurality of playback devices; And enabling playback of the content by the device at least partially in accordance with the first output.