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Paper 2014/077

Mixcoin: Anonymity for Bitcoin with accountable mixes

Joseph Bonneau and Arvind Narayanan and Andrew Miller and Jeremy Clark and Joshua A. Kroll and Edward W. Felten

Abstract

We propose Mixcoin, a protocol to facilitate anonymous payments using the Bitcoin currency system. We build on the emergent phenomenon of currency mixes, adding an accountability mechanism to expose theft. Unlike other proposals to improve anonymity in Bitcoin, our scheme can be deployed immediately with no changes to Bitcoin itself. We demonstrate that incentives of mixes and clients can be aligned to ensure that rational mixes will not steal from clients. We contrast mixing for financial anonymity with better-studied communication mixes, demonstrating important and subtle new attacks.

Note: Extended version

Metadata
Available format(s)
PDF
Category
Applications
Publication info
Published elsewhere. Major revision. Financial Crypto 2014
Keywords
Bitcoin
Contact author(s)
jbonneau @ gmail com
History
2014-04-22: revised
2014-02-04: received
See all versions
Short URL
https://ia.cr/2014/077
License
Creative Commons Attribution
CC BY
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