A signature scheme that hides the true signer among a group, providing signer ambiguity.
Ring signatures allow any member of a defined group to sign a message such that verifiers can confirm one of them signed, but not which one. In cryptocurrencies like Monero, ring signatures obfuscate the sender by mixing real inputs with decoys.
"A transaction input is signed using a ring of possible outputs; observers can tell one of them authorized the spend but cannot identify which."
Larger rings improve privacy but increase transaction size. Ring signatures hide the signer but do not hide amounts unless combined with techniques like confidential transactions.
"To improve privacy, wallets increase the ring size, but this also raises fees due to bigger transactions."
All terms and definitions may update as the Cryptionary improves.