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Trustless, Privacy-Preserving Blockchain Bridges

EasyChair Preprint no. 4962

13 pagesDate: February 3, 2021


In this paper, we present a protocol for facilitating trust-less cross-chain cryptocurrency transfers that preserve privacy of bridge withdrawals. We leverage zero-knowledge primitives that are commonly used to design cryptocurrency mixing protocols to provide similar functionality but across two or more blockchains. To that end, we receive cryptocurrency mixing "for free" through the bridge operations and describe how to extend these protocols to incentivise bridge transfers using ideas from previous work. We describe how resulting protocols lead to similar vampire attacks coined in the Uniswap vs. Sushiswap saga but across chains and discuss incentivisation mechanisms.

Keyphrases: Interoperability, Privacy, zero-knowledge

BibTeX entry
BibTeX does not have the right entry for preprints. This is a hack for producing the correct reference:
  author = {Drew Stone},
  title = {Trustless, Privacy-Preserving Blockchain Bridges},
  howpublished = {EasyChair Preprint no. 4962},

  year = {EasyChair, 2021}}
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