NEAR Chain Signatures (previously referred to as MPC technology) is a cross-chain signing solution built by NEAR Protocol that enables applications and smart contracts on NEAR to interact securely with multiple blockchains from a single NEAR account.

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Using advanced Multi-Party Computation (MPC) technology, private keys are never held by a single party or server. Instead, signing operations are distributed across a decentralized network of nodes, significantly improving security while enabling seamless cross-chain functionality.

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Chain Signatures allow developers and users to sign transactions and control accounts on networks such as Bitcoin, Ethereum, and other supported blockchains directly from NEAR. This creates a powerful chain abstraction layer where users can access multiple ecosystems without needing separate wallets, bridges, or complex infrastructure.

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By combining decentralization, interoperability, and secure cryptographic signing, NEAR Chain Signatures help simplify the multi-chain experience and support the next generation of cross-chain decentralized applications.