My solutions for the GCHQ challenge at www.canyoucrackit.co.uk are available here:
For those of you not familiar with the challenge, here is some more information:
GCHQ: solve the online code, become a real-life spy
“GCHQ, the intelligence agency, has created an internet-based code-breaking game in an attempt track down candidates with the right skills for espionage in the computer age.
Rather than hoping to identify potential spies in the traditional feeding grounds of Oxford and Cambridge, it has launched a viral campaign on Facebook and Twitter that directs users to a website called “Can you crack it?”
Players who can crack a code are directed to the GCHQ website and invited to apply for a job.”
If they really want to track down candidates with the right skills for espionage in the computer age, they should make harder challenges, but it was quite fun anyway. ;)