A growing number of organisations now offer "bug bounties", paying hackers or security researchers rewards for finding vulnerabilities.

But how do these programmes operate, and how do CISOs ensure that they are run ethically? What are the risks of inviting researchers to hack your organisation? How do bug bounties stack up against other methods of security testing?

And what are the benefits to security researchers themselves, as the programmes cannot work without hackers?

We cover the pros and cons of bug bounties with Ottilia Westerlund, hacker engagement manager at bug bounty platform Intigriti, and herself a former software engineer and published security researcher.