ABSTRACT
This chapter analyzes many of the new important multimedia encryption techniques. It discusses different research directions, which were taken in the area of video communication encryption. The proliferation of digital documents, multimedia processing tools and the worldwide availability of Internet access have created an ideal medium for copyright fraud and uncontrollable distribution of multimedia content. The three most important objectives of cryptography with respect to the multimedia information security include confidentiality, data integrity, and authentication. Modern cryptographic techniques provide solutions for these three objectives. In general, there are two types of cryptosystem: symmetric key cryptosystems and asymmetric key cryptosystems. The elliptic-curve-group algebra is much more complex, so the related cryptanalysis is much harder, resulting in smaller key requirements. Multimedia security in general is provided by a method or a set of methods used to protect multimedia content. A common approach in selective encryption is to integrate compression with encryption.
