Definition ∞ Cross-domain proofs are cryptographic attestations that verify the correctness of computations or state transitions occurring in one distinct blockchain or computational environment (domain) for another. They enable interoperability by allowing one system to trust the validity of events or data from a separate domain without needing to replicate the entire computation. These proofs are essential for secure communication and asset transfers between disparate blockchain networks. Understanding cross-domain proofs is key to grasping the architecture of multi-chain ecosystems.
Context ∞ The development and deployment of cross-domain proofs are central to the expansion of blockchain interoperability solutions. News often highlights advancements in optimistic rollups, zero-knowledge rollups, and bridge technologies that rely on these proofs. Discussions frequently address the security models of different proof systems, the potential for bridging exploits, and the challenges of achieving seamless asset and data movement across heterogeneous blockchain networks.
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