> There's almost no words there that would gel into comprehension in any way for average Joe and Jill. Hardly. The first paragraph is easy to understand -- you

> There's almost no words there that would gel into comprehension in any way for average Joe and Jill. Hardly. The first paragraph is easy to understand -- you tell them that "there's no proof it came from you" and that "its easy to fake emails" and that signing the emails digitally helps prevent that. Everyone can understand "there's no proof it comes from you" and "fake emails" follows on from that. Everyone knows what a physical signature is and how it helps identify that something was written by you and can imagine the concept of a digital one, even if they have no idea about the mechanics of one. That goes a long way to describe at least why you would want to digitally sign emails, even if it doesn't tell you anything about how it works.