A Picture is Worth a Thousand Bytes: Statistically innocent LSB steganography

Presented at Kiwicon V: It Goes b00m (2011), Nov. 6, 2011, 2:30 p.m. (15 minutes).

The point of steganography is not only to conceal a message inside an image, but also to conceal the fact that a hidden message even exists at all in the image. A common method is to manipulate the least significant bit(s). However, techniques based on this method typically suffer from a fundamental weakness: their ability to be detected statistically using the chi-squared test. In this presentation Edwin demonstrates an original algorithm that stands up to the chi-squred test in all but a few special cases. Reliable detection of data embedded using this algorithm is potentially very difficult, if not impossible.


Presenters:

  • Edwin Hermann
    Edwin is a business analyst by day, and programmer, radio broadcaster, podcaster, web developer and code tinkerer by night. Not a real hacker, but he has been known to have dabbled in amateur hacking in his younger days.

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