There is an encryption programm called Truecrypt that is free and will allow you to encrypt files in a cascade of basically unbreakable 255 bit encryptions.
The interesting part is that you have the option to include a second folder in your encrypted folder that will only come up if you type in a second password.
There is no way to tell if there is a second password or not because there is no way to tell whether there is a file within the file.
So, basically, they can blow me.
Encryption tools with built-in plausible deniability such as Truecrypt have been around for some time already, and “they” know about it.
However, the premise that made it attractive was the whole innocent-until-proven-guilty bit. Which doesn’t seem to be of much concern to a populace scared of terrorists, child pornographers and its own shadow.
Also, Truecrypt can only beat a superficial scan. As soon as they get into patterns and headers, the nature of the encryption data should become apparent.