Date Added: Dec 2012
Encryption is the widely used technique to offer security for video communication and considerable numbers of video encryption algorithms have been proposed. The paper explores the literature for already proposed video encryption algorithms with the focus on the working principle of already proposed video encryption schemes. This study is aimed to give readers a quick overview about various video encryption algorithms proposed so far. Recent advances in multimedia compression, communication technologies and abundant availability of low cost constrained display devices, have led to phenomenal growth of digital multimedia services and applications video chat, video conferencing, telemedicine & variety of entertainment services. These services are widely used over open network, so security of multimedia applications are on stake.