What Is “Ring Signature” Technology and How Does It Relate to Stealth Addresses?

Ring signatures are a cryptographic technique that allows a member of a group (a "ring") to sign a transaction without revealing which member signed it. In privacy coins like Monero, the sender's actual input is mixed with several other non-spending outputs (decoys) from the blockchain.

Stealth addresses obscure the recipient, while ring signatures obscure the sender, providing comprehensive transaction privacy.