TumbleBit: An Untrusted Tumbler for Bitcoin-Compatible Anonymous Payments

  title={TumbleBit: An Untrusted Tumbler for Bitcoin-Compatible Anonymous Payments},
  author={Ethan Heilman and Foteini Baldimtsi and Leen Alshenibr and Alessandra Scafuro and Sharon Goldberg},
  journal={IACR Cryptology ePrint Archive},
This paper presents TumbleBit, a new anonymous payments scheme 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. Our protocol combines fast cryptographic computations (performed off the… CONTINUE READING