Modern fair exchange protocol design: Dealing with complex digital items
ResumoFair exchange protocols are essential for ensuring fairness (i.e., atomicity) in exchanges concerning digital items between parties communicating through asynchronous channels. Although often regarded as generic bit streams, such items are usually complex artifacts that carry information relevant to a particular context – which may be of semantic, perceptual, legal, financial or functional nature, for instance – and reflect specific aspects that might interfere with the protocol designed for exchanging them. In this work we approach fair exchange protocol design by taking into account the intrinsic characteristics of digital items, as opposed to relying on the conventional generic bit stream assumption. Our discussion focuses on how several item properties may affect the exchange of digital items.
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