As cyber threats increase in frequency and sophistication, protecting business infrastructure from them seems like an impossible task. Could hackers be the solution to businesses' cybersecurity woes rather than the problem? Ethical hacking seems to be a contradiction in terms but big firms are adopting the technique to ensure their systems are locked down, transforming the hacker from foe to friend. Web behemoths including Facebook, Google and now PayPal are offering rewards to hackers who crack into their technology infrastructure and report their methods, and their security flaws, back to them with the assurance of no legal backlash. UKFast's director…