TrueCrypt is one of the best encryption programs around in my opinion, the program is very easy to use 
and very secure it has many different encryption options and the best part is you can have 3 encryption types encryption on encryption on encryption its amazing at how this works, you can make it look like for example a .pdf file or a .mp3 file allowing you to hide it even further but my favourite part is, hidden volumes this will use a already made truecrypt encryption and put a hidden folder inside it so for an example say you’ve made a truecrypt volume of 15mb’s but you want a hidden one well you can make one and say you make the volume 2mb’s the original file will then show as 13m’s.
You access this hidden volume by using a different password for the original volume it really is brilliant to hide things from hackers give it a go!