A Survey for Performance Analysis Various Cryptography Techniques Digital Contents

In the recent years, with the development of network and multimedia technology, multimedia data, especially image, audio and video data, is used more and more widely in human society. Some multimedia data, including entertainment, politics, economics, militaries, industries, education etc, are necessary to be protected by providing confidentiality, integrity, and ownership or identity. In this regard, to protect multimedia contents, cryptology, which appears to be an effective way for information security, has been employed in many practical applications. However, number theory or algebraic concepts based traditional ciphers, such as Data Encryption Standard (DES) (Tuchman, 1997), Advanced Encryption Standard (AES) (Zeghid et al., 1996), International Data Encryption Algorithm (IDEA) (Dang & Chau, 2000), and the algorithm developed by Rivest, Shamir and Adleman (RSA) (Cormen et al., 2001), most of which are used for text or binary data, appear not to be ideal for multimedia applications.