Some level of communication will always rely on vulnerability. If you build impenetrable walls to protect you from the outside world, you have to remember that walls work both ways.
It’s better to funnel than to block. Let people know lots of stuff about you! Just make sure it’s all stuff you willingly share. People will want to look, anyway – so let them find.
Don’t be afraid of information, in either direction. I promise, you’ll survive the sharing of it.