very good suggestion! i've been following this thread with interest. relevant to a commercial product i am working on. i thought keeping the key in the address book was the most practical idea. but, you still have to exchange the keys. the biggest problem is the lookup for a key in a key server (keystore). but, automatically sending a separate header sounds, er...automatic, transparent to the user. and lets the system do the work. long, more than 10 digits, unintelligible email addresses won't work. imho. can't be memorized, even if chunked. too many pieces.

On 9/19/2014 4:31 AM, Werner Koch wrote:
On Fri, 19 Sep 2014 06:57, [email protected] said:

She can send you email at [email protected] once, and when your replies
all come from:

   From: Derek Atkins <[email protected]>

then when she replies to you, she'll be sending encrypted emails.  But
The same can be achieved with a separate mail header for the key and a
local association of key and mail address for future communication
(which you need for the above scheme also).


Shalom-Salam,

    Werner


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