Reference : Privacy and Linkability of Mining in Zcash

	Document type :	Scientific congresses, symposiums and conference proceedings : Paper published in a book
	Discipline(s) :	Engineering, computing & technology : Computer science
	Focus Areas :	Security, Reliability and Trust
	To cite this reference:	http://hdl.handle.net/10993/39996

Title :	Privacy and Linkability of Mining in Zcash
Language :	English
Author, co-author :	Biryukov, Alex [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Computer Science and Communications Research Unit (CSC) > ; University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT)]
	Feher, Daniel [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > > ; University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Computer Science and Communications Research Unit (CSC)]
Publication date :	2019
Main document title :	2019 IEEE Conference on Communications and Network Security (CNS)
Publisher :	IEEE
Peer reviewed :	Yes
On invitation :	No
ISBN :	978-1-5386-7117-7
Event name :	2019 IEEE Conference on Communications and Network Security
Event date :	from 10-06-2019 to 12-06-2019
Event place (city) :	Washington D.C.
Event country :	United States of America
Keywords :	[en] blockchain ; cryptocurrency ; privacy ; linkability ; Zcash ; mining
Abstract :	[en] With the growth in popularity for cryptocurrencies the need for privacy preserving blockchains is growing as well. Zcash is such a blockchain, providing transaction privacy through zero-knowledge proofs. In this paper we analyze transaction linkability in Zcash based on the currency minting transactions (mining). Using predictable usage patterns and clustering heuristics on mining transactions an attacker can link to publicly visible addresses over 84% of the volume of the transactions that use a ZK-proof. Since majority of Zcash transactions are not yet using ZK-proofs, we show that overall 95.5% of the total number of Zcash transactions are potentially linkable to public addresses by just observing the mining activity.
Permalink :	http://hdl.handle.net/10993/39996
DOI :	10.1109/CNS.2019.8802711

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	Fulltext file(s): File Commentary Version Size Access Open access Zcash_Miner_Linking (2).pdf Author postprint 149.19 kB View/Open

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