[throwawayReply]

This is bad advice.

There's a reason that cyber is used, because you need something to disambiguate it from all the other kinds of security.

Imagine you're a policy person at the pentagon (or equivalent), if someone talks about security then that doesn't narrow it down to all the other kinds of security going on there.

You could use "info sec" but there are agencies who deal with a lot of information which doesn't necessarily mean this space either. They've been dealing with information security since their inception most of which I suspect is focused around people and not machines.

Cyber security makes it clear to those people what you're talking about.

To someone who works in SV and spends all day with developers the context is other way around, and in that context cyber sounds asinine and if you talk about security someone immediately knows it's security in your space.

That's my guess at why you tend to see 'info-sec' in the private space and 'cyber security' in the public space.