jassriver / steg

Command line steganography tool

Steg

Command line steganography tool.

Notice

I am trying an experiement - i am trying to restructure the way steg works.

Currently i am re-implementing the 3 working strategies another way that should scale more nicely meaning that more strategies will be easier to add later on.

Feel free to add strategies in the current way and i will still merge them. 🚀

Terms

• payload - the secret message or content to be hidden
• carrier - the entity in which you are trying to hide a payload
• package - the result of hiding the payload in the carrier
• encoding density - the normalised proportion of the package that the paylaod has affected
• channel - describes the type of carrier in which the payload will be hidden
• scheme - the way in which a payload will be hidden in the specific type of channel
• stratagy - refers to the combination of a channel and a scheme

Usage

cargo install steg (you must have [cargo](https://crates.io/install) installed)

// Hide something
steg hide -p ./payload.png -c ./carrier.png -o ./output.png

// Reveal something that was hidden
steg reveal -c ./output.png

The below is a plan of the supported payload and carrier types and default strategies for use with each.

Key

• ✔️ is done
• 🔨 is being made
• empty means not supported yet - make a PR!

Supported formats

• text
  • 🔨 utf8
• images
  • 🔨 png
  • jpeg
  • bmp
• videos
  • avi
  • mp4

Text default stratagies

Supported	Payload	Carrier	Default stratagy
✔️	utf8	utf8	whitespace_text_steganography
✔️	utf8	image/png	lsb_text_png_steganography
	utf8	image/jpeg
	utf8	image/bmp
	utf8	video/avi
	utf8	video/mp4

Image default stratagies

Supported	Payload	Carrier	Default stratagy
✔️	png	image/png	lsb_png_steganography
	png	image/jpeg
	png	image/bmp
	png	video/avi
	png	video/mp4
	jpeg	image/png
	jpeg	image/jpeg
	jpeg	image/bmp
	jpeg	video/avi
	jpeg	video/mp4
	bmp	image/png
	bmp	image/jpeg
	bmp	image/bmp
	bmp	video/avi
	bmp	video/mp4

Video default stratagies

Supported	Payload	Carrier	Default stratagy
	avi	image/avi
	avi	image/mp4
	mp4	image/avi
	mp4	image/mp4