[Cryptography] [cryptography] Secure universal message addressing

[dan at geer.org]

 > The whole idea that you need a way to securely communicate with
 > someone who you've never had any contact with before is mainly
 > incoherent.

Similarly, the bigger the financial transaction the less likely
it is to be between entities that do not know each other.  As
such, the substantial cost of a/the PKI Registration Agent done
right yields value only for transactions amongst strangers which
is to say the smallest transactions, i.e., the RA function will
never be done right.  Unless compelled.

--dan