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Steganography is a centuries old practice of hiding secret messages inside of another message, picture, or physical object. It is used to conceal and deceive all but the intended recipient. In today's age, a file, message, image, or video could be within any of the others that would go unnoticed by the untrained eye. One example of a hacker using this to their advantage is by sending the victim a word document that has been embedded with scripts that are activated by the file being opened.

Digital Techniques

In the past two decades, the amount of ways to use steganography using computer software has grown exponentially. Here are just a few examples of how to hide messages digitally:

  • Placing messages in the lowest bits of sound files.
  • Messages in tampered executable files
  • Videos with pictures only visible when played at slower or higher speeds.
  • Keyboard delays in packs sent over a network that encode data.
  • Blog-Steganography puts an encrypted message as comments or overlooked parts of a blog and the recipient has a key to decode it.
  • Echo Steganography is changing the echo of a sound file.
  • Putting messages in the usually ignored part of a file.
  • A message is sent in the error codes of a document.
  • Hiding an image in a sound file, which is analysed with a spectrogram.

Social Steganography

Popular in communities with strict rules and censorship, social steganography can be used to relay messages to a large number of people publicly, only visible to those who are looking for it. This can be anything from putting a message in a title of an image to misspelling words to give a message or alternate meaning.

steganography.txt · Last modified: 2021/03/31 23:28 (external edit)