WASET
    Edward Paul Guillen and  Diego Alejandro Chacon,  VoIP Networks Performance Analysis with Encryption Systems.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2009, vol. 34(10). 2425 - 2432
    [viewed 27 April 2024]. Available from: https://publications.waset.org/pdf/12357.