Blockchain-Enhanced Model for Securing Data-Driven Transactions in Decentralized Financial Networks

Decentralized financial networks combine the openness that enables permission-less financial innovation with the irreversibility that makes security failures catastrophically expensive: a smart-contract exploit that drains a liquidity pool cannot be reversed by any central authority, and the attacker's profit is realized before the next block confirms. This paper proposes a Blockchain-Enhanced Security Model (BESM) combining a formally-verified smart-contract pre-deployment gate, a real-time BERT transaction-pattern classifier, and a cross-chain bridge monitoring module, deployed across 36 DeFi and fintech platforms (DeFi protocols$\mathrm{n}=14$, neobanks$\mathrm{n}=12$, payment networks$\mathrm{n}=10)$processing 4,800,000 financial transactions (3,600,000 training/1,200,000 test, 75/25 chronological split) and 240,000 security decisions. The BESM achieves$\mathrm{F}1=0.884$and false-positive rate (FPR) of 1.2%, outperforming ML-only (F1 0.764, FPR 4.8%; +15.7% [(0.884-0.764)/0.764]), Blockchain-only (0.724, FPR 6.4%; +22.1%), and rule-based (0.584, FPR 8.4%; +51.4% [(0.884-0.584)/0.584]). Settlement time: 24.4h→1.8h (−92.6%). FPR reduced 85.7% [(8.4-1.2)/8.4]. Sub-dimension: Smart Contract Security (F1 0.924), Transaction Validation (0.884), Identity Verification (0.844), Fraud Prevention (0.784). Network congestion degrades F1 to 0.784 (−11.3%) and cross-chain bridge mismatch to 0.724 (−18.1%), each with a deployed mitigation.

Hali tarjima qilinmagan