فهرس المقالات B R Sujatha المقاله 1 - Secure Key Management Scheme for Hierarchical Network Using Combinatorial Design 20.1001.1.23221437.2022.10.37.8.8 10.52547/jist.15691.10.37.20 Siddiq Iqbal B R Sujatha Journal of Information Systems and Telecommunication (JIST) , العدد 1 , السنة 10 , زمستان 2022