Institute for Web Science and Technologies · Universität Koblenz - Landau
Institute WeST

Cost Fairness for Blockchain-based Two Party Exchange Protocols

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Matthias Lohr and Kenneth Skiba

Existing blockchain-based fair exchange protocols usually neglect consideration of cost for assessing their fairness.However, in an environment with non-negligible cost, such as public blockchains, high or unexpected cost might be an obstacle for wide-spread adoption in business applications.We address this issue by defining cost fairness, which can be used to assess fair exchange protocols regarding its cost and discuss how it can be achieved in general and especially in context of blockchain.We show, that in an environment with non-negligible cost (such as a public blockchain), a fair exchange protocol cannot achieve full cost fairness without an external compensation mechanism.

10.06.21 - 10:15
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