[Cryptography] [cryptography] Secure universal message addressing

[Allen]

>
> The key idea here is that you get to have *one* identifier for yourself
> under your control, that you can use everywhere, securely. Knowing that
> people have your real address should provide a strong guarantee that
> messages from them to you will go only to you. And you shouldn't need to
> change address because you changed messaging services.
>
> How would you guys go about designing a system like what I describe? How
> would you get it to play nice with P2P nodes?
>
How about making the address a Curve25519 public key?  Anyone who sends
something to that address could encrypt the contents using that key, so the
contents could only be read by you (assuming no one steals your key).
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