Adafruit has created a handy how-to to help you build a wireless access point that anonymizes your internet browsing. The Onion Pi Tor proxy directs your internet access through the Tor routing service. All your data packets go through three layers of relays before hitting their destination. This level of routing makes it difficult for anyone to determine who and where you are.

Source: Thumb Your Nose at the NSA With Raspberry Pi | WIRED

Thumb Your Nose at the NSA With Raspberry Pi