Digital Transmission Content Protection

The Digital Transmission Content Protection ( DTCP ) (also Digital Transmission Copy Protection) is a cryptographic protocol, to protect audio and video data from unauthorized copying, intercepting and tampering. Field of application is the transmission via digital interfaces (e.g., Firewire, USB, TCP / IP).

Developed the protocol of Intel, Matsushita (Panasonic), Sony, Toshiba and Hitachi.

It is used for example for video -on-demand, thus retrieved Movies can not be recorded or intercepted unjustified.

The data stream is encrypted according to sources with a specific code and the receiving device needs an appropriate license to decrypt the data. It is important that all members of the chain of transmission - from the transmitter to the output device (monitor / TV ) - decrypt the data stream both, as it also can encrypt again.

The encryption algorithms used are well adapted after the bad experience with CSS to the prior art.