Steg

Command line steganography tool.

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

steg -p ./payload -c ./carrier -s ./strategy.str

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

Key

• x is done
• :hammer: is being made
• empty means not supported yet - make a PR!

Supported formats

• [ ] text
  • [ ] utf8
• [ ] images
  • [:hammer:] png
  • [ ] jpeg
  • [ ] bmp
• [ ] videos
  • [ ] avi
  • [ ] mp4

Text default stratagies

| Supported | Payload | Carrier | Default stratagy | | ------------- | ------------- | ------------- | ------------------ | | [ ] | utf8 | utf8 | zero-width-spaces | | [ ] | utf8 | image/png | | | [ ] | utf8 | image/jpeg | | | [ ] | utf8 | image/bmp | | | [ ] | utf8 | video/avi | | | [ ] | utf8 | video/mp4 | |

Image default stratagies

| Supported | Payload | Carrier | Default stratagy | | ------------- | ------------- | ------------- | --------------------- | | [x] | png | image/png | lsbpngsteganography | | [ ] | 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 | |