A provably secure sharding based blockchain smart contract centric hierarchical group key agreement for large wireless ad-hoc networks[J] CONCURRENCY AND COMPUTATION-PRACTICE & EXPERIENCE 2021 Naresh, Vankamamidi S. Allavarpu, V. V. L. Divakar Reddi, Sivaranjani Murty, Pilla Sita Rama Raju, N. V. S. Lakshmipathi Mohan, R. N. V. Jagan
