I'm no expert and I've forgotten the phrase since my Yeshiva days but isn't something that's publicly known by x number of people not considered L"H?
Referring to "b’apei tlasa"?
No, but common misconception.You can check the gemora in Erchin 15b if you'd like.
I'm not usually the DDF "kanoi", it's just that I literally just learnt it again this morning so it's still fresh.