I appreciate everything you just said and agree that this could work well for some people. On the other hand, reading it through the eyes of the 99% of people I know who can barely check their email, everything you said may as well be written in Klingon. It is simply too difficult for most people to understand.
It's not an unsolvable problem with good apps/software though. A key as a sequence of characters is confusing, but depicting an actual key cut in half, that needs to be combined with another, would make sense to people.
As was said elsewhere, a lot of this will come as the space matures.
