PCWorld offers some good tips to reduce your visibility to PRISM surveillance.
Note that there is absolutely no guarantee that our tips will make your PC PRISM proof. One of the generally held beliefs in the security world is that, with enough resources on the part of the attacker, any secrets that are known about can eventually be unearthed. But let’s say that you support an “Arab Spring” movement in a country whose interests parallel those of the U.S. government. It’s this sort of political uncertainty that encrypting personal communications is designed to liberate.
So what can you do? Here are some tips.