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Steganography

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Steganography

Images

  • Adding two images
  • xor_bytes
  • color crypto


Command Line:

  • Pull out the audio with ffmpeg:
$ ffmpeg -i windows.mp4 windows.wav
  • Make a gif from video using ffmpeg
$ ffmpeg -i windows.mp4 windows.gif

Metadata

Image metadata

  • To find information inside a picture, we can use package pnginfo or pngcheck.

  • If we need base64 decoding (for example a PGP key with a picture).

  • Weird pieces of bytes may need to be XORed.

  • If we have a decrypted message and a key:

    1. Import the private key to use it to decrypt the message with gpg --allow-secret-key-import --import private.key
    2. Decrypt with gpg --decrypt message.pgp.
  • ExifTool


Other Tools

  • OpenStego
  • OutGuess
  • Gimp
  • Audacity
  • MP3Stego
  • ffmpeg
  • pngcheck
  • StegFS
  • Steghide