Steganography

• Hide arbitary data into an image

General info

Hide arbitary data inside the least significant bits (LSB) of data in an image.

Uses 3 color channels and lsb allowing (3widthheight)/8 bytes of storage

Example

For a 200x200 pixel bitmap there are 40k pixels, each with 3 channels (rgb) so by hiding stuff in the least significant bit of each channel of each pixel we are able to hide (40k * 3) bits of data or 15kb of data. This might seem like a lot but a raw bitmap of this size is about 1mb of data.

TODO: Library

• Attempts to zip data if it doesn't fit
• AES encrypt (including header), by default so (gen pass) so header is hidden
• Allow using 2*lsb
• Optionally allow usage of the alpha channel

TODO: Example app

• Structure
• Select photo activity
• Select file / message to hide
• Nice errors

Usage

Building

It's a standard gradle project.