According to DeFiLlama data, among the cumulative losses of approximately $16.69 billion from hacker attacks, DeFi exploits, and cross-chain bridge attacks in the crypto industry, about 40% are related to private key leaks, rather than blockchain or smart contract vulnerabilities. Multiple industry insiders stated that as smart contract security continues to improve, attackers are increasingly shifting their focus to areas such as private key management, cloud services, third-party tools, and personnel operations. The industry is gradually adopting solutions like MPC wallets, account abstraction, and hardware wallets to enhance key security. (CoinDesk)