Bruce knew everyone in Gotham city, he had access to the census database. He would be able to figure out anyone’s secret identity given enough time.

So why wasn’t he able to with you?

A spider themed hero just shows up one day out of the blue, and he has no leads as to who you are or what you want.

He hadn’t been able to speak to you one on one yet, but he knows he’ll get the chance. You two were crime fighters, your paths would cross eventually.