CryptoSentinel: An AI and Blockchain-Based Security Platform for Detecting Crypto Scams and Smart Contract Vulnerabilities

Cryptocurrency and decentralized finance (DeFi) have grown rapidly, but scams, fake tokens, and hacking attacks have caused billions of dollars in financial losses. Because blockchain transactions cannot be canceled or reversed once completed, victims usually have no way to recover stolen money. Existing security tools are either too technical for ordinary users or focus only on one specific problem—such as checking source code or checking web links. In this project, we designed and developed CryptoSentinel, an easy-to-use and unified cybersecurity platform that protects crypto users from common fraud. CryptoSentinel checks multiple risk factors in real time: (1) wallet addresses across Ethereum, BNB Chain, Polygon, and TRON; (2) smart contracts to find hidden traps like honeypots and excessive taxes; (3) fake peer-to-peer transfers, specifically 'Flash USDT' scams and forged payment receipts; (4) chat messages using a Machine Learning Natural Language Processing (NLP) model to identify seed phrase theft and phishing; and (5) suspicious websites and QR codes using threat intelligence and typosquatting detection. The platform computes a simple Trust Score from 0 to 100 so users can make safe decisions before sending money or connecting their wallets. In our experimental tests on 4,500 messages, 1,200 contracts, and 600 transaction receipts, the system achieved over 97% accuracy in scam message detection and 99% accuracy in finding honeypot contracts, while delivering complete analysis in less than 350 milliseconds.