alphasigmax at gmail.com
Mon Nov 7 16:09:17 CET 2005
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David Shaw wrote:
> On Mon, Nov 07, 2005 at 11:55:02PM +1030, Alphax wrote:
>>>>>It's a countermeasure against an attack against signing subkeys.
>>>>>Basically, the primary key signs all subkeys. With backsigs, the
>>>>>signing subkey also signs the primary key.
>>>>>Without this, an attacker can "steal" a signing subkey from someone
>>>>>else and try and pretend that a signature came from his own key. It's
>>>>>not a particularly good attack: the attacker can't issue signatures to
>>>>>prove his ownership.
>>>>Will this remove the possibility of moving subkeys from one primary key
>>>>to another / converting primary keys to subkeys (documented at
>>>No, it's unrelated to that. It's a countermeasure against a (somewhat
>>>weak) attack. It has nothing to do with various bit twiddling you can
>>>do to your own key.
>>So how /do/ they work (and how does one go about moving subkeys between
> I'm afraid I don't understand what you're asking here. How backsigs
1. I have a cvs version of 1.4.3, how do I issue backsigs?
2. How can I move some subkeys from one key to another, where the key I
want to move them too currently has NO subkeys?
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