Got some dirty little secrets...read this

[VoX]

Or you can just binary copy the .zip files into a jpeg...

http://www.youtube.com/watch?v=Zv_NBxrkymY

[Isphera]

Or you can leave your file unpassworded and unencrypted, to save pointless effort since your OS account has a password, and that's what it's there for. Yes, you can hack. But if someone has enought time in your house at your computer to hack your files without getting stopped, then it's your own damn fault.