Group key establishment is a fundamental aspect of secure communication in various network scenarios, ranging from collaborative environments to distributed systems. Traditional approaches often rely on expensive cryptographic operations such as pairings, which can introduce computational overhead, especially in resource-constrained environments. In this paper, we propose an efficient group key establishment protocol that leverages the benefits of Identity-Based Cryptography (IBC) and Elliptic Curve Cryptography (ECC) to achieve secure and scalable group communication without the need for pairings. We present a detailed analysis of the security properties of the protocol. Additionally, we provide performance evaluations that demonstrate the efficiency of our approach in terms of computational cost, communication overhead, and scalability. Our protocol’s compatibility with resource-constrained devices makes it particularly suitable for modern applications such as Internet of Things (IoT) environments and decentralized networks.