Information Hiding: Steganography done with JavaScript

This little demo here demonstrates the core functionality of my JavaScript library steganography.js. Basically it allows you to hide or read data in or from the alpha channel of any image.
Regarding the demo: first of all you may hide the text from the textarea inside any image - you have previously selected from your local filesystem - by using the "Hide"-button. After the new image with the text encoded inside is generated you may download it and distribute it with the secret message inside instead of the old boring messageless picture. As the second part it is possible to read a message encoded inside the selected image using the "Read"-button.
Note that there will be no message at all or some cryptic message if no alpha channel is set or the message is encoded with another algorithm, so I recommend you to use this demo to encode and decode the message.

Image:

Text:

Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi. Nam liber tempor cum soluta nobis eleifend option congue nihil imperdiet doming id quod mazim placerat facer possim assum. Typi non habent claritatem insitam; est usus legentis in iis qui facit eorum claritatem. Investigationes demonstraverunt lectores legere me lius quod ii legunt saepius. Claritas est etiam processus dynamicus, qui sequitur mutationem consuetudium lectorum. Mirum est notare quam littera gothica, quam nunc putamus parum claram, anteposuerit litterarum formas humanitatis per seacula quarta decima et quinta decima. Eodem modo typi, qui nunc nobis videntur parum clari, fiant sollemnes in futurum.