Any secret agent needs to be stealthy and, well, secret—and that includes their Internet activity. If you suspect that you are being tracked by the authorities, or even advertisers, then you need to make your Internet traffic anonymous while online.
In order to become anonymous on the Internet, we need to set up a Tor router. Tor (which stands for The Onion Router) facilitates anonymity by routing your traffic through a large worldwide network of relays that anonymize and obfuscate your location and web activity, making surveillance and analysis incredibly difficult. For more information about the Tor project see https://www.torproject.org.
The way it works is that we're going to use the Raspberry Pi as a wireless hotspot as we did earlier, but this time we're going to isolate the Wi-Fi network from the wired network and add some routing. The wired Ethernet will be connected to our Internet router on our home LAN. The Tor software will listen for...