multisig

Of a cryptocurrency wallet: requiring two or more signatures from different private keys in order to complete a transaction.

Security firm Check Point believes the attacker identified multisig signers responsible for approving transactions and hacked their devices through the use of malware, phishing, or a supply chain attack.

A multisig cryptocurrency wallet.

Schroé describes Spiderchains as a decentralized network of multisigs, similar in concept to the Lightning Network but using a different architecture.