DVB-CPCM
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This is the Content Protection and Copy Management standard being developed by the DVB Project ([1]).
It's main application is interoperable protection of European digital television, though other countries may also adopt the standard. In simplest form CPCM is a set of status "flags" sent in the data stream of a digital television program that indicates whether or not it can be recorded, or if there are any restrictions on recorded content.
CPCM will only be used to protect content after it has been acquired by the user. It is not used for protection of broadcasts, though broadcast signals may indicate a need for CPCM to be applied, and the rules (known as Usage State Information or USI) that CPCM should adopt for it.
CPCM will allow users to move and play digital television on any device that belongs to their Authorized Domain of devices, which can include devices in remote locations such as cars or vacation homes. CPCM specifications can be downloaded from [2].
CPCM can be compared to the failed U.S. broadcast flag where regulation was relatively narrow, the redistribution control flag could only be present or absent (recording of broadcast is allowed or not). DVB-CPCM, by contrast, is specifying remarkably fine-grained and elaborate means by which broadcasters can control the detailed functionality of receiving devices. CPCM contains a "robustness requirement" that demands that manufacturers design their technologies to resist end-user modification, which makes it impossible to implement CPCM in free and open source software like Linux.
[edit] External links
- EFF DVB CPCM Is a Stealth Attack on Europeans' Digital Rights
