Bridge

A bridge is a protocol that enables the transfer of assets, data, or information between different blockchains. Since most blockchains operate as separate networks with their own standards and tokens, bridges allow users to move cryptocurrencies or other assets without relying on intermediaries like centralized exchanges. This enhances interoperability within the Web3 ecosystem and enables the use of DeFi applications across multiple chains.

Blockchain bridges work in various ways—some lock assets on one blockchain and issue an equivalent representation on another (e.g., wrapped tokens like WBTC on Ethereum), while others use zk-rollups or multisig technology to securely verify transactions. While bridges are essential for the growth of decentralized ecosystems, they are also frequent targets of hacking attacks, making security a major challenge in their development.