What are multisignatures in cryptocurrencies?

Multisignatures (or multisig) is a security mechanism that requires multiple signatures to confirm a transaction in a cryptocurrency network. Instead of one signature from the owner, the operation requires the consent of several participants, significantly increasing the level of protection. This approach is used to create more reliable wallets and protect against hacking, as even if one key is compromised, the funds remain protected. Multisignatures can be configured for different scenarios, including the use of two or more keys to confirm a transaction.