Open AccessPolymerized RingCT: An Efficient Linkable Ring Signature for Ring Confidential Transactions in Blockchain
Author(s) -
Junke Duan,
Lixu Gu,
Shihui Zheng
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1738/1/012109
Subject(s) - ring signature , random oracle , computer science , signature (topology) , protocol (science) , blockchain , computer security , homomorphic encryption , scheme (mathematics) , confidentiality , ring (chemistry) , database transaction , anonymity , schnorr signature , oracle , public key cryptography , blind signature , encryption , mathematics , database , programming language , medicine , mathematical analysis , chemistry , geometry , alternative medicine , organic chemistry , pathology
In this work, we study and refer the privacy protection protocol used in the blockchain, in particular, the Ring Confidential Transaction protocol in current popular anonymous cryptocurrency Monero. Based on our observations on the underlying linkable ring signature and homomorphic commitment schemes, we design a new efficient RingCT protocol for protecting user’s transaction information. Our scheme is built on the Schnorr ring signature, the well-known Pedersen commitment and signature of knowledge. We show that the signature algorithm used in our scheme satisfies the security requirements under random oracle model and adaptive chosen message attack. Moreover, compared with other ring confidential transactions protocols, our scheme can significantly save the cost of operation and interaction linearly under multi-account operation, that is, unlike other schemes, the cost of its underlying signature algorithm doesn't grow linearly as the spender’s accounts grow.