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Stefan Dziembowski, Lisa Eckey, Sebastian Faust
2018 Proceedings of the 2018 ACM SIGSAC Conference on Computer and Communications Security - CCS '18  
We introduce FairSwap -an efficient protocol for fair exchange of digital goods using smart contracts.  ...  A fair exchange protocol allows a sender S to sell a digital commodity x for a fixed price p to a receiver R. The protocol is said to be secure if R only pays if he receives the correct x.  ...  Using smart contracts one can easily design a straightforward solution for the problem of securely selling digital goods over the Internet.  ... 
doi:10.1145/3243734.3243857 dblp:conf/ccs/DziembowskiEF18 fatcat:xjs2be4sb5emthqdnu65v3g6ty

Formalizing Cost Fairness for Two-Party Exchange Protocols using Game Theory and Applications to Blockchain (Extended Version) [article]

Matthias Lohr
2022 arXiv   pre-print
For example, as of 2021-12-17, the initialization of the FairSwap protocol on the Ethereum blockchain requires the selling party to pay a fee of approx. 349.20 USD per exchange.  ...  We address this issue by defining cost fairness, which can be used to assess two-party exchange protocols including implied transaction cost.  ...  RQ 3 How to achieve cost fairness for public blockchain-based two party exchange protocols (e.g., FairSwap)?  ... 
arXiv:2203.05925v2 fatcat:6avzxarcubbivjrojchuxnri4e

FileBounty: Fair Data Exchange [article]

Simon Janin, Kaihua Qin, Akaki Mamageishvili, Arthur Gervais
2020 arXiv   pre-print
We moreover show how FileBounty enables a flexible peer-to-peer setting where multiple parties fairly sell a file to a buyer.  ...  Digital contents are typically sold online through centralized and custodian marketplaces, which requires the trading partners to trust a central entity.  ...  We moreover show how FileBounty enables a flexible peer-to-peer setting where multiple parties fairly sell a file to a buyer. I.  ... 
arXiv:2008.11362v2 fatcat:ko6a6bwfbjfahcysrnycmif55y

A Smart Contract Refereed Data Retrieval Protocol with a Provably Low Collateral Requirement [article]

James M. Shook, Scott Simon, Peter Mell
2019 IACR Cryptology ePrint Archive  
We are able to achieve this due to our non-standard use of error-correcting codes. In addition, the protocol allows those storing the data to exchange it without the client's participation.  ...  Actual data transfer can take place with any standard anonymous exchange channel. Due to the anonymity of the parties, the smart contract cannot punish either party's off-ledger reputation.  ...  Another solution to the fair exchange problem is FairSwap [8] .  ... 
dblp:journals/iacr/ShookSM19 fatcat:2f7s2bc44fhb7oavoqcqhtc6ri

XChange: A Blockchain-based Mechanism for Generic Asset Trading In Resource-constrained Environments [article]

Martijn de Vos, Can Umut Ileri, Johan Pouwelse
2020 arXiv   pre-print
Blockchain technology provides primitives to represent these resources as digital assets on a secure distributed ledger.  ...  Furthermore, we find that XChange exhibits superior throughput and order fulfil latency compared to related decentralized exchanges, BitShares and Waves.  ...  FairSwap considers the fair exchange of digital goods [43] . It uses smart contracts which are stored in and managed by distributed ledgers.  ... 
arXiv:2004.05046v1 fatcat:ewxwyw6rubgcfbsoc7rb3bvxta

Fair Peer-to-Peer Content Delivery via Blockchain [article]

Songlin He, Yuan Lu, Qiang Tang, Guiling Wang, Chase Qishi Wu
2021 arXiv   pre-print
Our designs not only guarantee delivery fairness to ensure deliverers be paid (nearly) proportional to his in-time delivery, but also ensure the content consumers and content providers to be fairly treated  ...  Peer-to-peer (p2p) content delivery is promising to provide benefits like cost-saving and scalable peak-demand handling in comparison with conventional content delivery networks (CDNs) and complement the  ...  Exchange fairness [21] [22] [23] [24] [25] [26] , specifically for digital goods (such as signatures and videos), refers to ensuring one party's input keep confidential until it does learn the other party's  ... 
arXiv:2102.04685v4 fatcat:fopp6oidabbpxeoyiwlgeenucm

VeriML: Enabling Integrity Assurances and Fair Payments for Machine Learning as a Service [article]

Lingchen Zhao, Qian Wang, Cong Wang, Qi Li, Chao Shen, Xiaodong Lin, Shengshan Hu, Minxin Du
2019 arXiv   pre-print
Machine Learning as a Service (MLaaS) allows clients with limited resources to outsource their expensive ML tasks to powerful servers.  ...  In this paper, we present VeriML, a novel and efficient framework to bring integrity assurances and fair payments to MLaaS.  ...  Fair Exchange Using Blockchain In a computation service, the fair exchange problem is how to guarantee that the transaction between a seller S and a buyer B can be conducted fairly without one party cheating  ... 
arXiv:1909.06961v1 fatcat:yltpiq4id5hpxgn3jamqvbxhy4

Blockchain Scalability through Secure Optimistic Protocols

Lisa Eckey
The next contribution of this dissertation is the FairSwap protocol, which aims at reducing the costs for the secure sale of large digital goods.  ...  We will also show how to combine these channels in an off-chain manner to so-called virtual channels that connect even more users.  ...  Acknowledgments The four years of being a doctoral student was a true journey for me -starting in Bochum and ending in Darmstadt, it brought me to many exciting destinations on  ... 
doi:10.25534/tuprints-00014041 fatcat:4xyemvgjmzebvlbckwe6fz2tyy

Smart HealthCare System [article]

Debendranath Das, Amudhan Muthaiah, Sushmita Ruj
2022 arXiv   pre-print
However, today there is minimal scope for the Insurance Company to verify the validity of such bills or medical records.  ...  Blockchain integrated with the smart contract is a well-known disruptive technology that builds trust by providing transparency to the system.  ...  Next, the hospital sends the encrypted inputs to the patient using some fair exchange protocol (in our case, we are using fairswap protocol [27] ).  ... 
arXiv:2108.00807v2 fatcat:lyfmdxp5hrhu5ec73gvbqc6gcm

Generic Superlight Client for Permissionless Blockchains [article]

Yuan Lu, Qiang Tang, Guiling Wang
2020 arXiv   pre-print
Under such a game-theoretic model, we design a superlight-client protocol to enable a client to employ some relaying full nodes (e.g. two or one) to read the blockchain.  ...  ., the computational cost of the light client to predicate the (non)existence of a transaction in the blockchain becomes a small constant.  ...  1 Writing in the blockchain is trivial, as one can gossip with some full nodes to diffuse its messages to the entire blockchain network (a.k.a., network diffuse functionality [30, 7] ).  ... 
arXiv:2003.06552v2 fatcat:hkq3qabso5goxdxmqerg3rtjve

Smart Contracts for a Decentralized IoT Data Marketplace

Michael Peter Sober, Stefan Schulte
The IoT is growing steadily and so is the number of data that is generated and exchanged over the network.  ...  For this purpose, data marketplaces provide the platform to enable different parties to trade their data.  ...  I would also like to thank my advisor Salil Kanhere, who provided me with advice and assistance throughout my stay at the University of New South Wales.  ... 
doi:10.34726/hss.2020.65962 fatcat:s2jv5wkxgrdlnku3ukz6can6sa