Encryption Quality Evaluation of Robust Chaotic Block Cipher for Digital Imaging
Abdul Kadir Hamid, Mahmoud Ashraf Ragab, Osama S. Farag Allah, Amin Yousef Mohammad Noaman, Khalid.W. Magld · 2014
The visual inspection is an important fac tor in examining encrypted images, where the highly disappeared features of the image, the better the encryption al gorithm used. However, depending on the visual inspection only is not enough in judging the quality of complete hiding of the co ntent of the data image. In this paper, we estimate the degree of image encryption quality not only practically using visua l inspection, but also quantitatively using quality evaluation me trics. The efficient robust chaotic block cipher (RCBC) encryp tion quality algorithm for digital imaging is investigat ed. Comparative analysis regarding encryption quality (EQ) of the RCBC with algorithms such as RC6, and RC5 is performed. Ciphers design parameters are analyzed for their opt imal values, as function of different ciphers operation modes, i ncluding ECB, CBC, CFB, and OFB. Thorough experimental tests are carried out with detailed analysis demonstrating the better performance of the RCBC block cipher.