Paper 2020/1126

Bitcoin-Monero Cross-chain Atomic Swap

Joël Gugger

Abstract

In blockchains where hashed timelock contracts are possible atomic swaps are already deployed, but when one of the blockchains doesn't have this capability it becomes a challenge. This protocol describes how to achieve atomic swaps between Bitcoin and Monero with two transactions per chain without trusting any central authority, servers, nor the other swap participant. We propose a swap between two participants, one holding bitcoin and the other monero, in which when both follow the protocol their funds are not at risk at any moment. The protocol does not require timelocks on the Monero side nor script capabilities but does require two proofs of knowledge of equal discrete logarithm across the edward25519 and the secp256k1 groups and ECDSA one-time VES.

Metadata
Available format(s)
PDF
Category
Applications
Publication info
Preprint. MINOR revision.
Keywords
BlockchainAtomic SwapCross-Chain TransactionsBitcoinMonero
Contact author(s)
h4sh3d @ protonmail com
History
2020-11-18: revised
2020-09-21: received
See all versions
Short URL
https://ia.cr/2020/1126
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2020/1126,
      author = {Joël Gugger},
      title = {Bitcoin-Monero Cross-chain Atomic Swap},
      howpublished = {Cryptology ePrint Archive, Paper 2020/1126},
      year = {2020},
      note = {\url{https://eprint.iacr.org/2020/1126}},
      url = {https://eprint.iacr.org/2020/1126}
}
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