Comparative Performance Study on Ordinary and Chaos Image Encryption Schemes

The role of security becomes an essential issue since the rapid growth of numerous digital communication and multimedia system. In many applications, image security requirement is increased due to the importance of the digital image to be protected from unauthorised access. Image encryption and decryption schemes are one of the best ways to ensure high security. In recent time, chaos encryption technology has been advanced besides the most common of encryption algorithms namely AES, DES, Blowfish, El-Gamal and RSA. Image encryption and decryption consume a considerable amount of time because of a huge amount of image size. Considering both of time consumption and accuracy are the most decisive points for image security system, the efficient algorithm should be applied depending on the required security level of the application. This paper provides the evaluation of six different image encryption techniques namely AES, DES, Blowfish, RSA, El-Gamal and chaos techniques. The usefulness and effectiveness of each algorithm are shown through simulation result.