Yacine Challal and  Hamida Seba,  Group Key Management Protocols: A Novel Taxonomy.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2008, vol. 22(10). 3620 - 3633
    [viewed 18 September 2020]. Available from: https://publications.waset.org/pdf/11804.