EVA provides a decentralized, flexible, and secure network infrastructure for the encryption ecosystem, which provides an easy-to-use and unified security fortress privacy protocol layer middleware product for multiple chains. In the multi-chain ecology, EVA completes a scalable, high-efficiency, heterogeneous cross-chain privacy asset agreement. As a result, EVA can provide safe, reliable, and efficient network access and encrypted financial services for many ecosystems such as Web3.0 applications, NFT, and DeFi.