Implementation of Steganographic Techniques

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Implementation of Steganographic Techniques
Danny Friedheim pd. 2
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Background

• Steganography - the existence of the message is
  unknown
• as opposed to Cryptography - the existence of the
  message is clear, but it is unreadable

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Purpose

• to hide data in a WAVE file
• make data statistically undetectable
• extract hidden message with same program

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Expected Results

• working program inserts and extracts hidden
  messages
• existence of message is undetectable without
  comparison to original file

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Tools

• programming languages C
• algorithms original work by me for this purpose,
  i.e. no implementation of existing steganography
  algorithms

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Procedures/Methods

• program's methods controlled via command-line
  arguments
• -i (insert) inserts message into WAVE header (or
  -i2)
• -x (extract) finds message in header and displays
  it (or -x2)

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Procedures

• algorithm inserts each character of message into
  least significant bytes of actual sound data
• increases file size by very little, so hard to
  detect
• changes are undetectable by human ear

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Analysis/Tests

• listening to files and seeing whether a
  difference is evident
• eventually will use statistical analysis to
  determine likelihood of detection
• file sizes confirm that no data has been lost at
  this stage

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Results so far

• I can successfully insert a message into the WAVE
  file data and retrieve it later
• can also add whole text files with the -f flag
• plan to work on max message length algorithm

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Sample Output