En Raspberry Pi som Tor-Gateway

Tor is a widely known service that provides anonymous routing by encryption. When Tor is used, performance is sacrificed over anonymity, as the Tor network is for many reasons, slow. In this report it is investigated if a Raspberry Pi has enough performance to act as a wireless Tor gateway, and to investigate any potential bottlenecks in such a topology.Two scenarios were measured: one where the Raspberry Pi is configured with Tor and one where it is configured without. The data rate, the retrieval time, and the CPU load are then measured when a website is retrieved (one which is located in Sweden, and one located outside of Europe). Further measurements were done to measure the processing unit's impact on the data rate. It was found that the Raspberry Pi is fully capable of being used as a wireless Tor gateway, and that the bottleneck of the topology varied depending on if the Tor network is under heavy load or not.When Tor was heavily loaded, the measurements showed that a higher clock rate on the single-board computers CPU, as the network itself couldn't transfer any faster. When Tor was under light load, it was found that a higher clock rate was equal to a higher data rate, and a 30% shorter time of retrieval.