Ian Brown, Colin Perkins, and Jon Crowcroft
Proceedings of the 1st International Workshop on Networked Group Communication,
Pisa, Italy,
November 1999.
DOI:10.1007/978-3-540-46703-8_18
We outline a scheme by which encrypted multicast audiovisual data may
be watermarked by lightweight active network components in the
multicast tree. Every recipient receives a slightly different version
of the marked data, allowing those who illegally re-sell that data to
be traced. Groups of cheating users or multicast routers can also be
traced. There is a relationship between the requirements for the scheme
proposed here, the requirements for reliable multicast protocols, and
proposed mechanisms to support layered delivery of streamed media in
the Internet.
Download: discast.pdf