Efficiency and Security of Some Image Encryption Algorithms

Abstract — This paper describes the results of efficient measuring methods whereby the encryption capability of four algorithms are evaluated. Specifically this work focuses on measuring the encryption quality, the memory requirement and the execution time of the encryption as an indicator to the usage of the software and the hardware. Also, the security analysis of these schemes is investigated from cryptographic viewpoint; statistical and differential attacks. A number of requirements are therefore identified upon which the algorithms are evaluated. The results of the efficient measuring methods show that each algorithm has its own strengths and weaknesses and no single encryption mechanism is able to get the maximum security with minimum execution time. The paper proposes that it may be possible to develop new algorithms providing adequate means of efficiency with acceptable security.