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steghide

Steganography tool for JPEG, BMP, WAV and AU file formats.

More information.

Embed data in a PNG, prompting for a passphrase:

steghide embed --coverfile {path/to/image.png} --embedfile {path/to/data.txt}

Extract data from a WAV audio file:

steghide extract --stegofile {path/to/sound.wav}

Display file information, trying to detect an embedded file:

steghide info {path/to/file.jpg}

Embed data in a JPEG image, using maximum compression:

steghide embed --coverfile {path/to/image.jpg} --embedfile {path/to/data.txt} --compress {9}

Get the list of supported encryption algorithms and modes:

steghide encinfo

Embed encrypted data in a JPEG image, e.g. with Blowfish in CBC mode:

steghide embed --coverfile {path/to/image.jpg} --embedfile {path/to/data.txt} --encryption {blowfish|...} {cbc|...}

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