Censorship-Resilient and Confidential Collateralized Second-Layer Payments

Kari Kostiainen; Sven Gnap; Ghassan Karame

Paper 2022/1520

Censorship-Resilient and Confidential Collateralized Second-Layer Payments

Kari Kostiainen, ETH Zurich

Sven Gnap, ETH Zurich

Ghassan Karame

, Ruhr University Bochum

Abstract

Permissionless blockchains are too slow for applications like point-of-sale payments. While several techniques have been proposed to speed up blockchain payments, none of them are satisfactory for application scenarios like retail shopping. In particular, existing solutions like payment channels require users to lock up significant funds and schemes based on pre-defined validators enable easy transaction censoring. In this paper, we develop Quicksilver, the first blockchain payment scheme that works with practical collaterals and is fast, censorship-resilient, and confidential at the same time.We implement Quicksilver for EVM-compatible chains and show that censoring-resilient payments are fast and affordable on currently popular blockchains platforms like Ethereum and Polygon.

Metadata

Available format(s): PDF
Category: Applications
Publication info: Preprint.
Keywords: Payment channels permissionless blockchains
Contact author(s): kari kostiainen @ inf ethz ch
gnaps @ student ethz ch
ghassan @ karame org
History: 2022-11-07: approved; 2022-11-03: received; See all versions
Short URL: https://ia.cr/2022/1520
License: CC BY

BibTeX

@misc{cryptoeprint:2022/1520,
      author = {Kari Kostiainen and Sven Gnap and Ghassan Karame},
      title = {Censorship-Resilient and Confidential Collateralized Second-Layer Payments},
      howpublished = {Cryptology ePrint Archive, Paper 2022/1520},
      year = {2022},
      note = {\url{https://eprint.iacr.org/2022/1520}},
      url = {https://eprint.iacr.org/2022/1520}
}