Blockchain-Driven Transformer-Based Intrusion Detection and Access Control System (BDL-IDACS)

Abstract

The increasing complexity of cyber threats across IoT-cloud infrastructures necessitates the use of innovative, flexible, and confidentiality-preserving prevention techniques. The Blockchain-Assisted Hybrid Attention-Based Intrusion Detection and Access Control System (BHA-IDACS) is presented in this paper. The primary detection module employs an Adaptive Spatio-Temporal Representation Architecture-Self-Attention and Intersample Attention Transformer (Astra-SAINT) to precisely detect evolving intrusion tendencies. A heron optimization algorithm (HOA) is utilized for tuning the model thereby improving accuracy of detection and convergence. Fully Homomorphic Encryption (FHE) maintains the security of data and storage of encrypted data in unsecured cloud and blockchain circumstances. On a Consortium Blockchain, all encrypted transactions and audit trails are maintained by a Proof-of-Stake Authority (PoSA) consensus method. Additionally, based on user behavior and trust level, Smart Contract-Based Dynamic Access Control independently enforces permission and authentication regulations. The suggested model provides better precision, recall, F1-score, F2-score, specificity, and Cohen's Kappa values in addition to a mean accuracy of 99.16%. Furthermore, statistical analysis using confidence intervals and low standard deviation values demonstrates that Astra-SAINT is reliable and consistent across all validation folds. These results demonstrate the efficacy of the suggested Astra-SAINT framework as a scalable and dependable intrusion detection method for protecting IoT environments of the next decade.