Description: TumbleBit is a new anonymous payments protocol that is fully compatible with today’s Bitcoin protocol. TumbleBit allows parties to make payments through an untrusted Tumbler. No-one, not even the Tumbler, can tell which payer paid which payee during a TumbleBit epoch. TumbleBit consists of two interleaved fair-exchange protocols that prevent theft of bitcoins by cheating users or a malicious Tumbler. TumbleBit combines fast cryptographic computations (performed off the blockchain) with standard bitcoin scripting functionalities (on the blockchain) that realize smart contracts. TumbleBit was used to mix 800 input addresses to 800 output addresses on Bitcoin's blockchain.

Presentations:

• TumbleBit Presented at Scaling Bitcoin (Milan): Video, Transcript, Slides.
  

Papers:

• TumbleBit: An Untrusted Bitcoin-Compatible Anonymous Payment Hub
  Ethan Heilman, Foteini Baldimtsi, Leen Alshenibr, Alessandra Scafuro, Sharon Goldberg
  

• Blindly Signed Contracts: Anonymous On-Blockchain and Off-Blockchain Bitcoin Transactions
  Ethan Heilman, Foteini Baldimtsi, Sharon Goldberg
  3rd Workshop on Bitcoin and Blockchain Research at 2oth International Conference of Financial Cryptography, Barbados, February 2016.
  

Implementations:

• TumbleBit proof of concept source code.

• NTumbleBit: .NET library implementing Tumblebit primitives.

• The Hidden Wallet

• The Breeze Wallet

TumbleBit in the News:

• Bitcoin Magazine - by Aaron van Wirdum
  With TumbleBit, Bitcoin Mixing May Have Found Its Winning Answer
  (french Translation)
  

• Bitcoin Magazine - by Aaron van Wirdum
  With TumbleBit, Bitcoin Mixing May Have Found Its Winning Answer
  (french Translation)
  Bitcoin Privacy for All: Breeze Wallet Is About to Bring TumbleBit to Life
  

• CoinJournal - by Kyle Torpey
  TumbleBit Part 1: How Does This Bitcoin Privacy Proposal Compare to Monero and Zcash?
  TumbleBit Part 2: How Does This Bitcoin Privacy Improvement Compare with CoinJoin and CoinShuffle?
  TumbleBit Part 3: Potential Privacy Improvements for Bitcoin’s Lightning Network
  

• CoinJournal - by Kyle Torpey
  Investment Bank Praises Bitcoin Core Scaling Roadmap in Price Report
  

• Bitcoin.com - by Jamie Redman
  Blockchain Surveillance is Accelerating Privacy Tool Development
  

• CoinDesk - by Pete Rizzo
  What If One Bitcoin Isn't Like the Others? Fungibility Debated At Scaling Conference
  

• BTCManager - by JP Buntinx
  TumbleBit Promises Guaranteed Anonymity For Bitcoin
  

• Bitcoin.pl
  Tumblebit - zdecentralizowany mikser bitcoinów
  

• Bitcoin and Markets (podcast) - by Daniel French
  E021: TumbleBit, Drones, and Peaceful Protests
  

• Boston University News
  TumbleBit: New Paper Designs Anonymous Bitcoin Payment System
  

TumbleBit Blog Posts:

• Hackernoon - by nopara73
  Introducing HiddenWallet : Full Block SPV TumbleBit Wallet — Testing Release
  

• Freedom To Tinker - by Ethan Heilman
  Improving Bitcoin’s Privacy and Scalability with TumbleBit
  

• Waxwing's Blog - by Adam Gibson
  TumbleBit for the tumble-curious
  

• BitcoinBlog.de by Christoph Bergmann
  TumbleBit: ein neues Protokoll zur Anonymisierung von Bitcoins (BitcoinBlog.de)
  

• AboutVisions.de
  TumbleBit – Anonymisierung von Bitcoin-Transaktionen
  TumbleBit – Wie funktioniert das Verfahren?
  

• Frank Wang
  Summary of talk at MIT's Security Seminar about TumbleBit