My Response: There are absolutely no Freemasonic Secrets! There are only things that Freemasons have promised not to talk about with non-members.
If you're looking for something more significant to perpend though, a question to ask yourself would be "why would we promise not to talk about specific things with non-members?"
When seeking a suitable response, please avoid accepting as answers the profoundly lame excuses "because I promised not to!" or "because I gave my word!" Neither provides any insight into the "why" that has any substance to the issues at play and reveals that no well-thought out reasoning occurred.
Although "because I promised not to!" or "because I gave my word!" might be considered valid "excuses", neither addresses the foundational reason! And this reason has nothing to do with protection modes of recognition whatsoever.
What do you think this foundation reason might be?
-- Brother John S. Nagy
PS - You can read more about secrets in Building Boaz, "The Secret Realm" chapter.