TumbleBit: An Untrusted Bitcoin-Compatible Anonymous Payment Hub

被引：127

作者：

Heilman, Ethan ^{[1
]}

AlShenibr, Leen ^{[1
]}

Baldimtsi, Foteini ^{[2
]}

Scafuro, Alessandra ^{[3
]}

Goldberg, Sharon ^{[1
]}

机构：

[1] Boston Univ, Boston, MA 02215 USA

[2] George Mason Univ, Fairfax, VA 22030 USA

[3] North Carolina State Univ, Raleigh, NC USA

来源：

24TH ANNUAL NETWORK AND DISTRIBUTED SYSTEM SECURITY SYMPOSIUM (NDSS 2017) | 2017年

基金：

美国国家科学基金会;

关键词：

D O I：

10.14722/ndss.2017.23086

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

This paper presents TumbleBit, a new unidirectional unlinkable payment hub that is fully compatible with today's Bitcoin protocol. TumbleBit allows parties to make fast, anonymous, off-blockchain payments through an untrusted intermediary called the Tumbler. TumbleBit's anonymity properties are similar to classic Chaumian eCash: no one, not even the Tumbler, can link a payment from its payer to its payee. Every payment made via TumbleBit is backed by bitcoins, and comes with a guarantee that Tumbler can neither violate anonymity, nor steal bitcoins, nor "print money" by issuing payments to itself. We prove the security of TumbleBit using the real/ideal world paradigm and the random oracle model. Security follows from the standard RSA assumption and ECDSA unforgeability. We implement TumbleBit, mix payments from 800 users and show that TumbleBit's off-blockchain payments can complete in seconds.

引用

页数：15

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