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Ring signature

Ring signature

A ring signature is a type of cryptographic protocol designed such that any member of a network can add a signature without revealing their specific identity to the network, allowing for anonymous transactions.

A ring signature allows for secure signing of messages without compromising the anonymity of the signer. This works by hiding the identity of the signer within a group of users that each have keys that can be used to make the signature, then using cryptography to make it computationally infeasible for anybody to determine which set of keys was used to produce the signature in any given transaction.

Ring signatures offer privacy improvements over a predecessor protocol called group signatures. Group signatures are centrally managed/coordinated and require setup procedures, while ring signatures groups don't need to be managed and don't have initial setup procedures.

The cryptocurrency Monero implements a linkable ring signature scheme to ensure that transactions on its blockchain are private. Used along with stealth addresses, this ring signature scheme makes all transaction outputs in Monero untraceable while ensuring that the network can't decipher which outputs are spent or unspet.


Further Resources


Dual linkable ring signatures

Sarang Noether, Brandon Goodell

Research bulletin

How to Leak a Secret

Ronald L Rivest, Adi Shamir, Yael Tauman

Academic paper

Is all privacy created equal? Ring signatures vs coin mixing, with Chris Karabats

December 15, 2018

Rebekah Mercer

Privacy on the Blockchain:Unique Ring Signatures

Academic paper


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