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Privacy and Linkability of Mining in Zcash
Biryukov, Alex; Feher, Daniel
2019In 2019 IEEE Conference on Communications and Network Security (CNS)
Peer reviewed
 

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Keywords :
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.
Disciplines :
Computer science
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)
External co-authors :
no
Language :
English
Title :
Privacy and Linkability of Mining in Zcash
Publication date :
2019
Event name :
2019 IEEE Conference on Communications and Network Security
Event place :
Washington D.C., United States
Event date :
from 10-06-2019 to 12-06-2019
Main work title :
2019 IEEE Conference on Communications and Network Security (CNS)
Publisher :
IEEE
ISBN/EAN :
978-1-5386-7117-7
Peer reviewed :
Peer reviewed
Focus Area :
Security, Reliability and Trust
Available on ORBilu :
since 28 July 2019

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