Stenography is an unknown branch of cryptology which serves to hid a message within a message. When applied to programs it lets you hide a file within a file, without it appearing at first glance.
And this is what a program like Stealth Files does. it lets you encrypt and hide documents within EXE, DLL, OCX, COM, JPG, GIF, ART, MP3, AVI, WAV, DOC and BMP files, which will appear as normal files. But, using this program you can de-encrypt the file and read the hidden information. This is one of the more original security measures.
Thus with Stealth Files you can save your most confidential files with innocent audio files, documents, images etc. And they will stay this way until you decypher them with this program.