CertiK stated on social media that there were 751 security incidents in Web3 in 2023, resulting in losses of approximately 1.84 billion US dollars, a 51% decrease from 2022. Among them, the total loss of private key leakage incidents in 2023 exceeded 880 million US dollars, which was the highest among all types of incidents. The total loss of security incidents on Ethereum was 686 million US dollars, which was the highest among all chains. In addition, 35 cross-chain security incidents caused huge losses of nearly 800 million US dollars, highlighting the need to pay attention to interoperability vulnerabilities.