WASET
    Hossam El-din H. Ahmed and  Hamdy M. Kalash and  Osama S. Farag Allah,  Encryption Efficiency Analysis and Security Evaluation of RC6 Block Cipher for Digital Images .   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2007, vol. 2(2). 383 - 389
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/15813.