Erron writes:
Regarding 5.5.1.1 and 5.5.1.2; I am having a problem trying to understand
how one binds an encryption sub key to a particular user id and the top
level signing key?
You can't.
There seems to be no information contained in a sub-key packet that can
link it to a user id. Also, the binding signature does not contain info
regarding a user id (nor the binding signatures subpackets).
That's right.
By binding an encryption sub key to a primary signing key, you are binding
it to multiple user id's (if multiple user id's exist), however if user id
(a) wants to encrypt data using sub-key (b) and user id (b) wants to
encrypt data using sub-key (a), where do you actually make the bind?
There is no way to express this in OpenPGP.
Hal