Paper 2017/881
Möbius: Trustless Tumbling for Transaction Privacy
Sarah Meiklejohn and Rebekah Mercer
Abstract
Cryptocurrencies allow users to securely transfer money without relying on a trusted intermediary, and the transparency of their underlying ledgers also enables public verifiability. This openness, however, comes at a cost to privacy, as even though the pseudonyms users go by are not linked to their real-world identities, all movement of money among these pseudonyms is traceable. In this paper, we present Möbius, an Ethereum-based tumbler or mixing service. Möbius achieves strong notions of anonymity, as even malicious senders cannot identify which pseudonyms belong to the recipients to whom they sent money, and is able to resist denial-of-service attacks. It also achieves a much lower off-chain communication complexity than all existing tumblers, with senders and recipients needing to send only two initial messages in order to engage in an arbitrary number of transactions.
Note: full version
Metadata
- Available format(s)
-
PDF
- Category
- Cryptographic protocols
- Publication info
- Published elsewhere. Major revision. PETS 2018
- Keywords
- anonymitycryptocurrencies
- Contact author(s)
- rebekah @ cs au dk
- History
- 2018-01-02: revised
- 2017-09-17: received
- See all versions
- Short URL
- https://ia.cr/2017/881
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2017/881,
author = {Sarah Meiklejohn and Rebekah Mercer},
title = {Möbius: Trustless Tumbling for Transaction Privacy},
howpublished = {Cryptology {ePrint} Archive, Paper 2017/881},
year = {2017},
url = {https://eprint.iacr.org/2017/881}
}