Puff

Puff is a cute application with two different and useful functions within it.

The first of those functions will let you hide any file into any picture or audio file in just two clicks. If you want to recover it, you'll only have to access it using Puff.

The second one will let you sign digitally your pictures, songs and videos. By that way you'll apply a kind of invisible copyright that will allow you know when a picture, audio or video file is yours.

Puff is an interesting application, although you will need it to recover and use those files you have previously modified using it.