Research Article
NTRU Implementation of Efficient Privacy-Preserving Location-Based Querying in VANET
Table 5
The proposed privacy-preserving location-based querying scheme.
| Central Server | RSUs | Holds messages , | . |
| Initialization phase | | , | | , G is a grid, | | For all and , | | , | | , , | | , | | Put and all in RSUs. | | | Receives and stores as well as all locally. |
| Local RSU | Driver | Holds and all as above. | Holds , , | . |
| Authentication and transaction phase | | | Requests for service. | and sends it to the driver. | | | , | Completes the authentication as well as payment process with the central server. | | Receives from the central server and sends it to the RSU. | Verifies . | | Retrieving phase | | | Retrieves all from local RSU. | Executes the NTRU-based protocol with the driver. | Executes the NTRU-based protocol with the RSU and gets and . | | , | | , | . |
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