Cryptology ePrint Archive: Report 2020/1521

Delegated RingCT: faster anonymous transactions

Rui Morais and Paul Crocker and Simao Melo de Sousa

Abstract: We present a modification to RingCT protocol with stealth addresses that makes it compatible with Delegated Proof of Stake based consensus mechanisms called Delegated RingCT. Our scheme has two building blocks: a customised version of an Integrated Signature and Encryption scheme composed of a public key encryption scheme and two signature schemes (a digital signature and a linkable ring signature); and non-interactive zero knowledge proofs. We give a description of the scheme, security proofs and a prototype implementation whose benchmarking is discussed. Although Delegated RingCT does not have the same degree of anonymity as other RingCT constructions, we argue that the benefits that the compatibility with DPoS consensus mechanisms brings constitute a reasonable trade-off for being able to develop an anonymous decentralised cryptocurrency faster and more scalable than existing ones.

Category / Keywords: applications / Anonymity, Privacy, Monero, RingCT, Dele- gated Proof of Stake

Date: received 4 Dec 2020

Contact author: ru morais at ubi pt

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Version: 20201208:124416 (All versions of this report)

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