PQMDSBS: Post-quantum multivariate digital signature-based blockchain security scheme for mobile edge IoT applications

Integration of Internet of Things (IoT) and Edge Computing (EC) presents significant challenges, particularly in guaranteeing secure communication amid IoT devices and cloud systems formerly to data aggregation. Existing aggregation schemes often compromise on cost-effectiveness while struggling to preserve data integrity and confidentiality in face of emerging quantum computing threats. In response to the rising demand for robust security protocols, Post-Quantum (PQ) cryptography, particularly Multi-Variate Digital Signature (MVDS) has become increasingly significant in Public Key (PK) cryptosystems. This paper presents an MVDS-based aggregate signature scheme that efficiently consolidates multiple signatures into a single, verifiable cryptographic signature, enhancing both security and performance. The proposed scheme is specifically designed for mobile edge-based IoT applications and utilizes blockchain technology to assurance of secure and transparent data storage. Comprehensive security analyses reveal that this mechanism offers superior resistance to quantum attacks while improving efficiency when compared to existing benchmarked approaches. Additionally, simulations conducted using NS3 and blockchain frameworks establish effectiveness of the propounded scheme in maintaining data integrity and authenticity in a quantum-resistant manner. This work represents a significant advancement in securing IoT environments from emerging digital threats.