ECURING DIGITAL COMMUNICATIONS: A DYNAMIC IDENTITYBASED KEY AGREEMENT APPROACH

Abstract

With the rapid growth of digital communication systems, ensuring secure and efficient key agreement protocols has become critical to protecting sensitive data against emerging cyber threats. Traditional static identity-based key agreement schemes often suffer from vulnerabilities such as identity theft, replay attacks, and excessive computational overhead, limiting their scalability and practical deployment. To address these challenges, this paper introduces a Dynamic Identity-Based Key Agreement (DIKA) scheme designed to enhance both security and efficiency in distributed environments. The proposed scheme leverages dynamically generated identity credentials, lightweight cryptographic operations, and mutual authentication to prevent impersonation and key-compromise attacks. By incorporating session-specific randomization and forward secrecy properties, DIKA significantly reduces the risks of replay and man-in-the-middle attacks. Extensive security analysis demonstrates that the scheme resists common cryptographic attacks while achieving low computational and communication overhead. Furthermore, experimental evaluations validate its superior performance in terms of key exchange latency, energy consumption, and scalability, making it highly suitable for modern applications such as IoT networks, cloud communication, and mobile environments. The results establish DIKA as a robust and practical solution for strengthening digital communication security.