Joel Eriksson
CEO/Founder of ClevCode. Vulnerability researcher, exploit developer and reverse-engineer. Previous CTO and co-founder of Bitsec, which was acquired by Nixu, and Cycura which was acquired by WELL Technologies. Have spoken at BlackHat, DefCon and the RSA conference. CTF player. Puzzle solver (Cicada 3301, Boxen)

GCHQ

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. ;)