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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.

• Detect embedded data in a PNG:

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, 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, 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}

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