ZKCross is a trustworthy cross-chain protocol built on multichain zkRollup technology. One biggest value proposition of ZKCross is interoperability — the ability to communicate across different blockchains, ZKCross addresses the issue of independently verifying the header chain’s correctness by proposing and implementing a batch aggregating zero-knowledge-proof-based relay system. Instead of verifying each header of a source chain, the ZKCross system rolls up many transactions together before pushing them back to the target chains and batching their signature check and snark proof. The platform enables the DeFi ecosystem to develop cross-chain applications requiring high security, efficiency, and scalability.