According to CoinMeta, as the crypto industry develops, a single blockchain no longer dominates the market. Users often transfer assets between multiple networks such as Ethereum, Solana, BNB, Base, Polygon, etc., in order to access decentralized finance (DeFi) applications, NFT, and gaming platforms with lower fees. While crypto bridges serve as protocols that connect different blockchains and are an important part of the infrastructure, they also pose significant security risks. Historically, many major hacking incidents have occurred during the bridging process, highlighting these risks. Crypto bridges allow digital assets and data to move between two independent blockchains, enabling users to use DEFI applications on different chains without having to sell their assets first. Although the transfer process is seamless for users, it actually involves multiple smart contracts and verification systems. Crypto bridges lock up millions of dollars in assets, and due to their reliance on a smaller group of verifiers or complex smart contracts, they become targets for hackers. One of the largest hacking incidents was the attack on the Ronin bridge, resulting in losses of about $625 million. To reduce risks, users should use mature protocols that have undergone independent security audits and carefully check the source chain and target chain before making transfers.