Abstract: This paper surveys the progress of the Ring Signature and presents an XTR-Ring Signature on the basis of our new XTR-Schnorr signature protocol. Our new XTR-Schnorr signature, with the same security and computational complexity as the known XTR-Nyber-RUEPPEL signature, has two advantages: 1. the length of our signature is shorter. 2. the block cipher algorithm is not needed. The XTR-Ring Signature algorithm is of less computational cost and a shorter length than Ring Signature schemes based on RSA or DL.

Key words: ring signature, public key system, XTR-Schnorr signature