WASET
    Long Jye Sheu and  Horng-Shing Chiou and  Wei Ching Chen,  A Semi- One Time Pad Using Blind Source Separation for Speech Encryption.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2011, vol. 56(8). 803 - 806
    [viewed 11 May 2024]. Available from: https://publications.waset.org/pdf/6210.