Cross-chain Atomic Swaps With Bitcoin Cash (BCH) Using One-Time Verifiably Encrypted Signatures (VES)

I published this today on my Gitlab repo:

Cross-chain Atomic Swaps With Bitcoin Cash (BCH) Using One-Time Verifiably Encrypted Signatures (VES)

Abstract. With advances in cryptography, it became possible to implement atomic swaps between Bitcoin (BTC) and Monero (XMR) and two such protocols have been successfuly demonstrated.
However, the protocols require the scriptable network to have 2nd-party malleability solved and list SegWit as a requirement.
With advances in Bitcoin Cash (BCH) smart contract capabilities, it became possible to implement an equivalent atomic swap protocol despite BCH network not having SegWit.

In this work, we present our solution to cross-chain atomic swaps between Bitcoin Cash (BCH) and Monero (XMR), using adaptor signatures and discrete logarithm equivalence proofs.
Our solution uses newly available native introspection opcodes to commit to transactions contents, making it immune to 2nd-party malleability, and with transaction size significantly reduced compared to previous work.
We also introduce a cross-chain atomic swap between Bitcoin Cash (BCH) and Bitcoin (BTC), using similar approach.

Keywords: Blockchain · Atomic Swap · Bitcoin Cash · Monero · Adaptor Signatures.

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