DCAGKA: Dynamic certificateless asymmetric group key agreement protocol for IoT
Abstract
With the rapid advancement of communication technologies, the demand for IoT device interaction and collaboration in clustered environments has significantly increased, making secure communication among devices within a group a critical challenge. Asymmetric group key agreement ensures data transmission security by generating asymmetric keys for the group members. However, the dynamic nature and resource constraints of IoT devices pose challenges in ensuring strong security, low computational overhead, and efficient communication. Specifically, existing solutions lack effective support for device privacy protection, malicious device traceability, and dynamic group key updates. To address these issues, we propose a dynamic certificateless asymmetric group key agreement protocol, as DCAGKA. DCAGKA generates the shared public key and independent private keys for group members to ensure secure group communication, and supports dynamic group key updates when a member joins or leaves, meeting the high mobility and dynamic management requirements of IoT. Through security analysis and security proofs, DCAGKA enables fast traceability of malicious devices and privacy protection of device identities, and satisfies various security properties such as forward security, ensuring the security of IoT data transmission. Through theoretical analysis and simulation experiments, the results show that DCAGKA outperforms existing methods in computational and communication efficiency, making it more suitable for IoT.