Nishisonic / ts-steganography

Hide secret messages with TypeScript and this library

ts-steganography

ts-steganography is a TypeScript library used to encode secret messages inside images and to decode them again.
It will be a replacement of steganography.js to TypeScript. The usage itself is the same.

How does it work

Behind the scenes ts-steganography 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.

How to use it

The use of the library is very simple. You just have to add the .js-file to your website and by now you can make use of the global object steganography or short steg and the two provided functions encode and decode.

$ npm install ts-steganography

• encode takes a message as String and a image as Image, HTMLImageElement or String representing the data-URL of the cover image. Returns the data-URL of the image with the encoded message inside.
• decode takes a image as Image, HTMLImageElement or String representing the data-URL of the image and returns the message which was found in the image.