Abstract
Scalable video compression is the encoding of a single video sequence into multiple layers, each layer with its own data rate. Because of the computational complexity of full video
encryption, partial encryption has emerged as a general trend for both standard and scalable video codecs. Depending on the application, a particular layer of the video stream is chosen for encryption. In some applications, however, more than one video layer may need to be protected. This results in more complicated key management as multiple keys are
needed. In this paper, we present an integrated approach to encrypting multiple layers. Our proposal is a prepositioned shared secret scheme that enables the reconstruction of different keys by communicating different activating shares for
the same prepositioned information. It presents advantages over three other key management schemes.
Note
Proceedings of the IEEE International Conference on Multimedia and Expo, August 26-29, 2002, Lausanne, Switzerland
