On Jun 5, 2009, at 12:27 PM, Kārlis Repsons wrote:

On Friday 05 June 2009 15:23:10 Werner Koch wrote:
On Fri,  5 Jun 2009 16:59, j...@jameshoward.us said:
On Fri Jun 5 10:52:48 2009, David Shaw <ds...@jabberwocky.com> wrote:
--allow-secret-key-import is a no-op.  It is no longer used for
anything.

Really?  I could not import last week without it.

Sure:
Ok, but I am still in problem, because, after I did

thekey == mail address
Machine 1: gpg --export-secret-keys (thekey) > myfile.gpg
Machine 2: gpg --import myfile.gpg

it says

gpg: Total number processed: 1
gpg:               imported: 1
gpg:       secret keys read: 1
gpg:   secret keys imported: 1

However, I had there 3 subkeys today! And after doing import, they all appear
through gpg, but no way to use any with kmail!
I also tried thekey == key ID, but it gave equal outputs for all the IDs...
What is wrong?

Nothing is wrong. When you export a key, all of the subkeys go along with it.

Actually, I would appreciate, if someone explains me the concept of master and
subkeys in gpg -
1) the exclusive/overlapping functions of them

Traditionally, the master key is used for signing and a subkey is used for encryption. In practice, you can actually have many subkeys, each with whatever purpose you like.

2) does fingerprint change, if subkey is added (or, does that refer to the
master key only)?

No, the fingerprint does not change. The key fingerprint is that of the master key.

(Subkeys actually have fingerprints too, but you don't usually see them since referring to the master key brings all of the subkeys along automatically).

3) how about the revocation certificates, that are generated for master key,
if signing subkey is added afterwards?

Key revocation certificates are always generated for and by a master key.

David


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