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Computer Science > Cryptography and Security

arXiv:1701.06726 (cs)
[Submitted on 24 Jan 2017 (v1), last revised 11 Feb 2017 (this version, v3)]

Title:Instantaneous Decentralized Poker

Authors:Iddo Bentov, Ranjit Kumaresan, Andrew Miller
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Abstract:We present efficient protocols for amortized secure multiparty computation with penalties and secure cash distribution, of which poker is a prime example. Our protocols have an initial phase where the parties interact with a cryptocurrency network, that then enables them to interact only among themselves over the course of playing many poker games in which money changes hands.
The high efficiency of our protocols is achieved by harnessing the power of stateful contracts. Compared to the limited expressive power of Bitcoin scripts, stateful contracts enable richer forms of interaction between standard secure computation and a cryptocurrency.
We formalize the stateful contract model and the security notions that our protocols accomplish, and provide proofs using the simulation paradigm. Moreover, we provide a reference implementation in Ethereum/Solidity for the stateful contracts that our protocols are based on.
We also adopt our off-chain cash distribution protocols to the special case of stateful duplex micropayment channels, which are of independent interest. In comparison to Bitcoin based payment channels, our duplex channel implementation is more efficient and has additional features.
Subjects: Cryptography and Security (cs.CR)
Cite as: arXiv:1701.06726 [cs.CR]
  (or arXiv:1701.06726v3 [cs.CR] for this version)
  https://doi.org/10.48550/arXiv.1701.06726

Submission history

From: Iddo Bentov [view email]
[v1] Tue, 24 Jan 2017 04:24:40 UTC (592 KB)
[v2] Thu, 26 Jan 2017 07:00:10 UTC (597 KB)
[v3] Sat, 11 Feb 2017 05:26:58 UTC (778 KB)
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