ietf-openpgp
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Re: q re binding user id's and subkeys

2000-07-14 08:09:33
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

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