I tried browsing the Darpa challenge's website to know more, but I couldn't find any information. Could someone please post a link to a detailed description of the challenge?
It is basically computers playing Capture the Flag (CTF) against each other. They are given binary programs with security flaws. They need to identify the flaws automatically and develop a patch for their own system. At the same they go out to crash the other teams. Normally humans do this, but the darpa challenge was to have computer systems do it autonomously.