An Overview of the Use of Distributed Source Coding in Multimedia Security

In the 1970’s Slepian and Wolf proved that lossless source coding without side information at the encoder may perform as well as encoding with side information at the encoder. Wyner and Ziv extended the result to establish ratedistortion bounds for lossy compression. This has been used to examine the problem of coding multiple correlated distributed sources. In distributed coding, source statistics are exploited at the decoder and the encoder can be simplified. Since then these theoretic results were revisited in the late 1990s and several methods have been developed to achieve the results predicted by the theory. They are generally based on the channel coding techniques. In the past several years we have seen a great deal of work done in distributed video coding. In this paper we will describe some of the new uses of distributed source coding methods to address several interesting problems in multimedia security. In particular we describe the use of distributed coding principles to address problems in authentication, forensics, and secure multimedia delivery.