Alex Kelleher's Blog » steganography http://blog.alexkelleher.com Psychology, data, future gazing, digital marketing and the internet. Sat, 15 May 2010 22:23:33 +0000 en hourly 1 http://wordpress.org/?v=3.0 Hiding data in images – Steganography http://blog.alexkelleher.com/2008/08/17/hiding-data-in-images-steganography/ http://blog.alexkelleher.com/2008/08/17/hiding-data-in-images-steganography/#comments Sun, 17 Aug 2008 18:21:07 +0000 admin http://blog.alexkelleher.com/?p=130 Either a good way to conceal data, or an under-utilised way of compressing information when sending it alongside images - either way, Steganography is a neat idea.   Sadly, generally used for nefarious purposes.  

For a test, I embedded the text of the U.D. of Human Rights (1772 words) in this image (image courtesy of freephotos) using this site (maxant).  You can decode it using the same site (password 1111).    The text only took 36% of the image, which means that a fair amount more information can be hidden away, with absolutely no difference visible to the human eye:

original

Original

Embedded

Embedded

It’s not too hard to imagine that some really smart uses for this data-carrier method could be integrated into applications that (still) would benefit from better use of bandwidth.

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