| The following is a test on security. See how many points you can gain.
Your current score is:
0
Watermarks and hidding within graphics
There are literately an endless number of ways that stenography can be used. One
example, is to add information into files which can not actually used, such as
in images files. The figure below shows an example where a GIF file contains a colour
table, of which, typically, not all the colours are used in any image. Thus text
can be added to the file, which will never actually be seen.
For the following images, download the GIF file, and find the hidden message.
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