DeFi security: How trustless bridges can help protect users

Own this piece of history　　Blockchain bridges allow decentralized finance (DeFi) users to use the same tokens across multiple blockchains. For example, a trader can use USD Coin (USDC) on the Ethereum or Solana blockchains to interact with the decentralized applications (DApps) on those networks.　　While these protocols may be convenient for DeFi users, they are at risk of exploitation by malicious actors. For example, in the past year, the Wormhole bridge — a popular cross-chain crypto bridge between Solana, Ethereum, Avalanche and others — was hacked, with attackers stealing over $321 million worth of wrapped Ethereum (wETH), the largest hack in DeFi history at the time.　　Just over a month later, on March 23, 2022, the Ronin Network bridge — Axie Infinitys Ethereum-based sidechain — was hacked for over $620 million, and on Aug. 2, the Nomad bridge was hacked for over $190 million. In total, over $2.5 billion was stolen from cross-chain bridges between 2020 and 2022.　　Trustless bridges, known as noncustodial or decentralized bridges, could improve users security of cross-chain transfers.　　What is a blockchain bridge？　　A cross-chain bridge is a technology that allows sending of assets or data from one blockchain network to another. These bridges allow two or more separate blockchain