Sure, as I mentioned, the physical key analogy isn't a perfect match. I'm jsut suggesting that there are some clear starting places where it should be possible

Sure, as I mentioned, the physical key analogy isn't a perfect match. I'm jsut suggesting that there are some clear starting places where it should be possible to leverage existing skills, instead of starting from scratch. The details about a actually-usable product will be more complicated (and probably requires some experimentation).