Note that the problem goes both ways - the candidate may be afraid of being sued by their employer if they tell you (a competitor) any details about their curre

Note that the problem goes both ways - the candidate may be afraid of being sued by their employer if they tell you (a competitor) any details about their current work. You should really be asking a lawyer about these kinds of issues, not random people on HN. And the candidate may also want to consult their own lawyer before agreeing to meet with you.