A Hybrid Groupkey Management Service for Static Iot Applications

Abstract

Group management is essentially used for broadcasting and multicasting messages encrypted using a common group key so that only an authorized group member can decrypt the messages. Group key management is done using a centralized trusted server, responsible for key distribution and updates. Software Defined Network (SDN) based security controllers are used for group management service to provide horizontal security control. Several security services are provided by cloud service centres. The application specific security solutions are limited. In the proposed work, an SDN embedded fog or edge server is used for group key management service to route keys to the respective devices to secure group communication. A novel hybrid tree-based group key management technique is proposed which uses a combination of Logical Key Hierarchy (LKH) and One-Way Function Trees (OFT) scheme. The performance evaluation shows that the scheme is efficient when compared to the existing key management techniques in terms of member device computation and storage overhead.