RingCT 2.0: A Compact Accumulator-Based (Linkable Ring Signature) Protocol for Blockchain Cryptocurrency Monero

Sun, Shifeng and Au, Man Ho and Liu, Joseph K. and Yuen, Tsz Hon (2017) RingCT 2.0: A Compact Accumulator-Based (Linkable Ring Signature) Protocol for Blockchain Cryptocurrency Monero. In: European Symposium on Research in Computer Security 2017.

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Abstract

In this work, we initially study the necessary properties and security requirements of Ring Confidential Transaction (RingCT) protocol deployed in the popular anonymous cryptocurrency Monero. Firstly, we formalize the syntax of RingCT protocol and present several formal security definitions according to its application in Monero. Based on our observations on the underlying (linkable) ring signature and commitment schemes, we then put forward a new efficient RingCT protocol (RingCT 2.0), which is built upon the well-known Pedersen commitment, accumulator with one-way domain and signature of knowledge (which altogether perform the functions of a linkable ring signature). Besides, we show that it satisfies the security requirements if the underlying building blocks are secure in the random oracle model. In comparison with the original RingCT protocol, our RingCT 2.0 protocol presents a significant space saving, namely, the transaction size is independent of the number of groups of input accounts included in the generalized ring while the original RingCT suffers a linear growth with the number of groups, which would allow each block to process more transactions.

Item Type: Conference or Workshop Item (Paper)
Subjects: Projects > BloSSom 2019
Main Topics > Monero
Main Topics > Security
Divisions: Computer Science
Depositing User: Unnamed user with email richard.dabels@uni-rostock.de
Date Deposited: 09 Sep 2019 15:26
Last Modified: 09 Sep 2019 15:26
URI: http://blossom.informatik.uni-rostock.de/id/eprint/112

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