Optimistic Fair Priced Oblivious Transfer

Provided by: Katholieke Universiteit Leuven
Topic: Security
Format: PDF
Priced Oblivious Transfer (POT) is a two-party protocol between a vendor and a buyer in which the buyer purchases digital goods without the vendor learning what is bought. Although privacy properties are guaranteed, current schemes do not offer fair exchange. A malicious vendor can, e.g., prevent the buyer from retrieving the goods after receiving the payment, and a malicious buyer can also accuse an honest vendor of misbehavior without the vendor being able to prove this untrue.

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