tldr/pages/common/zsteg.md

zsteg

Steganography detection tool for PNG and BMP file formats. It detects LSB steganography, ZLIB-compressed data, OpenStego, Camouflage and LSB with the Eratosthenes set. More information: https://github.com/zed-0xff/zsteg.

• Detect embedded data in a PNG image:

zsteg {{path/to/image.png}}

• Detect embedded data in a BMP image, using all known methods:

zsteg --all {{path/to/image.bmp}}

• Detect embedded data in a PNG image, iterating pixels vertically and using MSB first:

zsteg --msb --order yx {{path/to/image.png}}

• Detect embedded data in a BMP image, specifying the bits to consider:

zsteg --bits {{1,2,3|1-3}} {{path/to/image.bmp}}

• Detect embedded data in a PNG image, extracting only prime pixels and inverting bits:

zsteg --prime --invert {{path/to/image.png}}

• Detect embedded data in a BMP image, specifying the minimum length of the strings to be found and the find mode:

zsteg --min-str-len {{10}} --strings {{first|all|longest|none}} {{path/to/image.bmp}}