FreeNet (Score 2, Informative)

The safest and most anonymous protocol I've seen is Freenet. If anyone was lucky enough to see the Freenet presentation at DEFCON, they illustrated how a message could theoretically be sent over a trusted social network, location-independent and subsequently anonymous. The theory proposed that instead of a massive random anonymous freenet node network, Freenet would begin to integrate normal human-like social networks, allowing users to "validate" the identity of other users without compromising anonymity (Somewhat like a PGP-key signing party). Each user would pick a random number, and based on their social network of trusted friends, their number would be switched with other users, giving the illusion of proximity. Not only was the proposed theory location-independent, they also illustrated how a man-in-the-middle attack couldn't happen without being completely obvious (In the presentation, it was illustrated that a message to a false "John Kerry" would take a large and noticable amount of hops (if the message got there at all) because "John Kerry" doesn't have a normal social network that would be apparent with a prominent political figure). Of course, I do see how this method could possibly be vulnerable (As we all know how easy social engineering can be): A) A "trusted" person who is being used as a hop point could intercept the message and compromise security. (A risk you take when trusting friends, and friends-of-friends) B) The message sender or receiver could be compromised, and a person could theoretically follow the chain of hops to the other party involved.