[TW5] Presenting.... TiddlySteganography: Hide messages in images using tiddlywiki

[Jed Carty]

I needed a palette cleanser after my recent work, so I put together a very simple steganography tool for tiddlywiki. There is more description on the demo wiki here (http://ooktech.com/jed/ExampleWikis/TiddlySteganography/)

It is one of the simplest methods of steganography and it is implemented in a very straightforward way so it isn't useful anything other than education or as a toy, but I will probably make it better.

Note: I just found out that the demo breaks in Safari for some reason, I am working on that. I have only tested it in Safari and Firefox, so if it works or doesn't work in other browsers let me know. The way I access the images is kinda hacky so that may be the problem. Also if someone has a good way to save an image as a tiddler from a canvas that would be appreciated, I haven't actually looked at that part yet.

[Jed Carty]

Well, it no longer crashes on safari, but it doesn't like something and doesn't actually work on safari. I don't know why and I am not going to think about it for now.

[Mat]

Man! That is cool! Useful in really desperate situations, I guess. Hope I'll never have to use it for real ;-)  ;-)   ;-)

<:-)

[Dragon Cotterill]

I do so love Steganography. If only because it can also be used to carry dodgy Javascript past nosy anti-virus systems to infect systems and insecure mobiles.

Not that I would know about such things of course. :p

Cool implementation Jed.

[RunningUtes]

Here is another version of steganography in javascript.

https://www.peter-eigenschink.at/projects/steganographyjs/

Behind the scenes steganography.js uses an algorithm to convert the given message into appropriate binary data which then will be hidden in the alpha channel of the given cover image. A HTML5 canvas element is then used to process the data and the image. To decode a message from a given image, a similiar algorithm is applied on the imagedata.