Today I was reading an interesting Wired article today called "How Joe Biden Accidentally Helped Us All E-Mail in Private". I remember tinkering with PGP during that time and some of the controversy surrounding encryption, especially good encryption. The encryption battle of that time was largely won and we are generally free to make use of it in our lives. Of course, very few people do.
I was demonstrating a network sniffer called WireShark for a buddy a while back. It basically captures whatever packets are passing through the network and allows you to copy them, view them, etc. He was surprised to see that in some cases email was being sent by people in the total clear, with no sort of encryption or anything. In some cases the username and password for thre user's account were easily visible. That's a sobering thing to see, yet people still don't seem concerned about encrypting their information.
There is a lot of talk about The Cloud (cue Arnold Schwarzenegger's voice) and the concern about keeping our information out there because someone might find it and see it. Again... these are clear, unencrypted files and information.
There is already some good, free, open stuff out there to help people increase the security of their information. A lot of it is very easy to use with easy methods for establishing trust and exchanging keys with people you want to see your information while protecting it from the casual mail server admin with nothing better to do than read your stuff as it comes through. (Would they do that? You bet! Those late nights can get lonely and boring.)
Can you make things secure enough so that no one can possibly read it? Probably not. If you are dealing with James Bond sorts of secrets and the high tech espionage centers of the world are focused on you, then they will probably hack you. For the rest of us, we can cut out the casual observer and demand that someone who wants to get into your stuff needs to devote some resources and most likely get a warrant.