Truth and lies are often neighbours.
True, there are less women working in Information Security.
False, it has anything to do with discrimination. In fact, the job market right now is so good that I cannot for the life of me believe any company would turn down a woman or risk making her not take the offer by paying her less. Right now I know of several customers who are dying to hire qualified IS people (if you're anywhere in central Europe and/or willing to relocate, contact me).
Neighbourhood: Several studies about the alleged "gender pay gap" already revealed that the actual causes of the gap is that, statistically speaking, women have less years of experience at the same age, more gaps in their careers and CVs, and negotiate worse. Some of that may be gender-related, but it's not the same as crying "discrimination".
Whenever I am leading a team, I personally am happy to have a good mix of men and women, it tends to give the broadest perspective and the best results. But if you have an imbalance, you should look for the underlying reasons, not just paint a buzzword over it.