Stealth Files 4.0 - Version 4.0 Stealth Files hides any type of file in almost any other type of file. This is called steganography. This is a way of encrypting data so that it is hard to find. You can not decrypt something unless you know what to decrypt. Using steganography, Stealth Files compresses, encrypts, and then hides any type of file inside many other types of files, including EXE, DLL, OCX, COM, JPG, GIF, ART, MP3, AVI, WAV, DOC, BMP, and most other types of video, image, and executable files. You will still be able to view, open, and run these files without and problems. If you want to, you can also use a password to encrypt the hidden files.