I think because you somewhat misunderstood the point of the keynote at this security conference. Giving advice about how to buy better locks is either going to

I think because you somewhat misunderstood the point of the keynote at this security conference. Giving advice about how to buy better locks is either going to be too basic or too lengthy & detail oriented for a presentation of this kind, meant to promote the practice of picking and give historical context. (And entertain.)