Dispute Resolution for Smart Contract-based Two-Party Protocols

Wagner, Eric; Völker, A; Fuhrmann, Frederik; Matzutt, Roman; Wehrle, Klaus

doi:10.1109/bloc.2019.8751312

Cited by 21 publications

(17 citation statements)

References 15 publications

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“…• In order to incentivise both parties to act honestly and prevent grieving, we incorporate fees into the dispute resolution sub-protocol. • We implemented the OptiSwap protocol and improved it using the technique introduces by SmartJudge [20] in order to estimate the gas costs 1 . The obtained values are compared against the original FairSwap protocol.…”

Section: Contributionmentioning

confidence: 99%

“…Optimistic mode. The SmartJudge architecture was proposed by Wagner et al in 2019 [20]. It provides an abstraction of a two-party protocol that relies on the execution of a smart contract in case of dispute.…”

Section: Related Workmentioning

confidence: 99%

“…Since the majority of its logic is only required for dispute handling and evaluating the PoM, the contract can be split into two parts. This is an approach which has been introduced in [20]. It allows to deploy the dispute logic only in case the Buyer triggers the dispute.…”

Section: Extensions and Optimizationsmentioning

confidence: 99%

“…We also analyze an optimized version of the contracts which we call split contract. Here we apply the idea from [20], where we create two versions of the judge contract. The first part is responsible for the execution in the optimistic case and the second part only for the dispute.…”

Section: Runtime and Gas Costsmentioning

confidence: 99%

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OptiSwap: Fast Optimistic Fair Exchange

Eckey

Faust

Schlosser

2020

Proceedings of the 15th ACM Asia Conference on Computer and Communications Security

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Selling digital commodities securely over the Internet is a challenging task when Seller and Buyer do not trust each other. With the advent of cryptocurrencies, one prominent solution for digital exchange is to rely on a smart contract as a trusted arbiter that fairly resolves disputes when Seller and Buyer disagree. Such protocols have an optimistic mode, where the digital exchange between the parties can be completed with only minimal interaction with the smart contract. In this work we present OptiSwap, a new smart contract based fair exchange protocol that significantly improves the optimistic case of smart contract based fair exchange protocols. In particular, OptiSwap has almost no overhead in communication complexity, and improves on the computational overheads of the parties compared to prior solutions. An additional feature of OptiSwap is a protection mechanism against so-called grieving attacks, where an adversary attempts to violate the financial fairness of the protocol by forcing the honest party to pay fees. We analyze OptiSwap's security in the UC model and provide benchmark results over Ethereum. CCS CONCEPTS • Security and privacy → Cryptography.

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Section: Contributionmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Section: Extensions and Optimizationsmentioning

confidence: 99%

Section: Runtime and Gas Costsmentioning

confidence: 99%

See 2 more Smart Citations

OptiSwap: Fast Optimistic Fair Exchange

Eckey

Faust

Schlosser

2020

Proceedings of the 15th ACM Asia Conference on Computer and Communications Security

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“…For example, Shafagh et al [21] show how homomorphically encrypted data can be exchanged securely. Wagner et al [22] propose an approach to exchange digital goods based on mediator smart contracts, which enable dispute resolution. This work provides the means for decentralized exchange of CTI with smart contracts, but does not provide a browsable platform or quality assurance.…”

Section: Related Workmentioning

confidence: 99%

DEALER: decentralized incentives for threat intelligence reporting and exchange

Menges

Putz

Pernul

2020

Int. J. Inf. Secur.

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The exchange of threat intelligence information can make a significant contribution to improving IT security in companies and has become increasingly important in recent years. However, such an exchange also entails costs and risks, preventing many companies from participating. In addition, since legal reporting requirements were introduced in various countries, certain requirements must be taken into account in the exchange process. However, existing exchange platforms neither offer incentives to participate in the exchange process, nor fulfill requirements resulting from reporting obligations. With this work, we present a decentralized platform for the exchange of threat intelligence information. The platform supports the fulfillment of legal reporting obligations for security incidents and provides additional incentives for information exchange between the parties involved. We evaluate the platform by implementing it based on the EOS blockchain and IPFS distributed hash table. The prototype and cost measurements demonstrate the feasibility and cost-efficiency of our concept.

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COVID‐19 and future pandemics: A blockchain‐based privacy‐aware secure borderless travel solution from electronic health records

2022

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COVID‐19 pandemic undoubtedly lingers on and has brought unprecedented changes globally including travel arrangements. Blockchain‐based solutions have been proposed to aid travel amid the pandemic hap. Presently, extant solutions are country or regional‐based, downplay privacy, non‐responsive, often impractical, and come with blockchain‐related complexities presenting technological hurdle for travelers. We therefore propose a solution namely, Borderless to foster global travel allowing travelers and countries collaboratively engage in a secure adaptive proof protocol dubbed Proof‐of‐COVID‐19 status a number of arbitrary statements to ascertain the fact that the traveler poses no danger irrespective of the country located. As far as we know, this is first of its kind. Borderless is implemented as a decentralized application leveraging blockchain as a trust anchor and decentralized storage technology. Security analysis and evaluation are performed proving security, privacy‐preservation, and cost‐effectiveness along with implementation envisioning it as a blueprint to facilitate cross‐border travel during the present and future pandemics. Our experimental results show it takes less than 60 and 3 s to onboard users and perform proof verification respectively attesting to real usability scenarios along with the traits of arbitrary proofs to aid responsiveness to the dynamics of pandemics and blockchain abstraction from travelers.

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Dispute Resolution for Smart Contract-based Two-Party Protocols

Cited by 21 publications

References 15 publications

OptiSwap: Fast Optimistic Fair Exchange

OptiSwap: Fast Optimistic Fair Exchange

DEALER: decentralized incentives for threat intelligence reporting and exchange

COVID‐19 and future pandemics: A blockchain‐based privacy‐aware secure borderless travel solution from electronic health records

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