Security

PrETP: Privacy-Preserving Electronic Toll Pricing

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Executive Summary

Current Electronic Toll Pricing (ETP) implementations rely on on-board units sending fine-grained location data to the service provider. The authors present PrETP, a privacy-preserving ETP system in which on-board units can prove that they use genuine data and perform correct operations while disclosing the minimum amount of location data. PrETP employs a cryptographic protocol, Optimistic Payment, which they define in the ideal-world/ real-world paradigm, constructs, and proves secure under standard assumptions.

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