The integration of Contributory Group Key Agreement (CGKA) for group formation revolutionizes the collaborative process of generating group keys, instilling trust and fostering collaboration among group members. By ensuring that each member actively contributes to the generation of the group key, CGKA distributes the responsibility of key generation across the group, thereby enhancing the security and resilience of the group's cryptographic infrastructure. Concurrently, the utilization of Lattice Diffie-Hellman (LDH) for key generation leverages the mathematical properties of lattices to securely derive shared secret keys. LDH offers a robust and efficient method for generating keys in cryptographic applications, ensuring the confidentiality and integrity of communication channels. Furthermore, the incorporation of blockchain technology for implementing membership changes introduces a decentralized and transparent approach to managing group membership dynamics. By leveraging blockchain's distributed ledger technology and smart contracts, membership changes can be executed securely, transparently, and efficiently. This enhances the integrity and resilience of the group's membership management system, allowing for the secure addition and removal of members from the group while maintaining the integrity of the cryptographic infrastructure. Together, the integration of CGKA, LDH, and blockchain technology presents a comprehensive solution for advancing the security and scalability of dynamic group membership management protocols, offering a robust framework for secure and efficient communication in contemporary environments. Moreover, the proposed integration of CGKA, LDH, and blockchain technology facilitates seamless adaptation to dynamic changes in group membership, ensuring that security and scalability are maintained even as the composition of the group evolves. Through simulations and performance evaluations, the effectiveness of the integrated approach that is implemented in Python Software is demonstrated compared to existing protocols like Elliptic Curve Diffie-Hellman (ECDH), RSA Key Exchange, and Post-Quantum Cryptography (PQC).
Keywords
Contributory Group Key Agreement, Lattice Diffie-Hellman, Blockchain, Group Membership Management, Security.
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CRediT Author Statement
The authors confirm contribution to the paper as follows:
Conceptualization: Renisha P S and Bhawana Rudra;
Methodology: Renisha P S;
Software: Bhawana Rudra;
Data Curation: Renisha P S;
Writing- Original Draft Preparation: Renisha P S and Bhawana Rudra;
Visualization: Renisha P S;
Investigation: Bhawana Rudra;
Supervision: Renisha P S;
Validation: Bhawana Rudra;
Writing- Reviewing and Editing: Renisha P S and Bhawana Rudra;All authors reviewed the results and approved the final version of the manuscript.
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Renisha P S
Department of Information Technology, National Institute of Technology, Surathkal, Karnataka, India.
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Cite this article
Renisha P S and Bhawana Rudra, “Advancing Security and Scalability - A Protocol Extension for Dynamic Group Membership Management”, Journal of Machine and Computing, vol.5, no.3, pp. 1931-1943, July 2025, doi: 10.53759/7669/jmc202505151.
