Paper on DGKA presented at AIBlock workshop
The INSPIRE-5Gplus related paper titled “Dynamic group key agreement for resource-constrained devices using blockchains” was presented on 19 October 2020 at the AIBlock workshop, which was held in conjunction with the 18th International Conference on Applied Cryptography and Network Security (ACNS) 2020.
INSPIRE-5Gplus partner Zurich University of Applied Sciences (ZHAW) collaborated with researchers from other universities to devise a group key agreement protocol for dynamic environments with limited resources, which is an important security challenge for 5G and Beyond 5G systems. In general, dynamic group key agreement (DGKA) protocols are one of the key security primitives to secure multiparty communications in decentralized and insecure environments while considering the instant changes in the communication group.
However, with the ever-increasing number of connected devices, traditional DGKA protocols have performance challenges, as each member in the group has to make several computationally intensive operations while verifying the keying materials in order to compute the resulting group key. To overcome this issue, the paper proposes a new approach for DGKA protocols by utilizing the Hyperledger Fabric framework as a blockchain platform. To this end, we migrate the communication and verification overhead of DGKA participants to the blockchain network in our developed scheme. This paradigm allows a flexible DGKA protocol that considers resource-constrained entities and exploits trade-offs regarding distributed computation.