30/07/10 00:54 bacterix

The opening cipher of the Cyber Security Challenge to which an official solution
should be presented later today can be divided into 3 main parts:

	1. base64
	2. rot13
	3. ror5

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- 1. base64  -
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The starting code is available on the site and is basically a base64 encoded
JFIF image of an xkcd.

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- 2. rot13   -
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Upon closer inspection a pattern is visible in the frame of the image. When the
frame is put together it reveals a rot13 encoded URL which leads to the final
part.

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- 3. ror5    -
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The final cipher is a hex code equivalent to 500-bytes of encoded data which can 
be decoded by rotating each byte to the right by 5. One can use the 'ror' x86
instruction or alternatively perform bit shifts in C.