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@donovanhide
Last active December 22, 2015 22:39
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https://canyoufindit.co.uk solution for fourth part. Find the two jpeg headers. Skip the first to reveal the second!
$curl -s http://www.theregister.co.uk/Design/page/hub/gchq-enigma2013/img/image/comp3.jpg | xxd -g0 | grep ffd8ff
0000000: ffd8ffe000104a4649460001010100c8 ......JFIF......
000cbd0: 401fffd9ffd8ffe000104a4649460001 @.........JFIF..
$ curl -s -r 52180- http://www.theregister.co.uk/Design/page/hub/gchq-enigma2013/img/image/comp3.jpg > 4.jpg
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