A ring signature allows a member of a group to sign a message on behalf of the group, without revealing who the actual signer is. It is used in privacy-focused systems like Monero to hide the sender among a group of decoys (Monero (RingCT)).
Note
Implementation of ring signatures with the curve25519-dalek crate using the Ristretto group (Why Ristretto?).
Options:
-n, --n <N> Ring size [default: 5]
-s, --signer <SIGNER> Index of signer [default: 2]
-m, --message <MESSAGE> Message to sign [default: "Ring signatures are cool."]For example,
cargo run -r -- -n 10 -s 2 -m "Ring signatures are cool."outputs:
Number of Signers : 10
Signer Index : 2
Message : Ring signatures are cool.
Signature:
c0 = 99b46fb00ae67a7e12b9cc5097c22db6bb855aa23d0182742fd90a84538afc09
s[0] = 15d5ba651ff5757af80ce986c6041ac31366c841127bc508fc8a78438756f700
s[1] = d198821b087dff7d9099395cdd531a65b3862ec62161418fbc4965ca9ab3740b
s[2] = c6de14551480fef1c91330beffce60e8456035ac6a6fa5b7c61993daa2e8990b
s[3] = e8ef01811d9237f7bbcae0bc2c1270b8b916a48fd07d9dc152438f68df934b01
s[4] = c60387b3b840631460a56dc9a2bf4ae93c70f9c439033b5e7567b08231cd7b02
s[5] = 294ed77e893b2146aa6d6e28c2d6ed9a4451647045982404ef16a9c20e9c910f
s[6] = 65763d4500b4d6a83f3d3e978b58e2139078f5a182dba48ca36c05c04caf8f0b
s[7] = e0572ac14dce8a50c1a2fa33f48bc9bbe1a0e0be99bcab4e5ca6925d3a973705
s[8] = 559603b71a6036a49e25f0a00323d92ce8c55cde176295a6bb947e141575320c
s[9] = 948038559c6d4ceebff4e15e1cba5f94a879fcfe8fbdc6f2a4dce410f5414f0c
Valid signature: true