[vox] PGP question: Multiple Machines

Ken Bloom kabloom at ucdavis.edu
Wed Jan 19 09:01:09 PST 2005


On Wed, 19 Jan 2005 03:28:43 -0800
"Karsten M. Self" <kmself at ix.netcom.com> wrote:

> on Tue, Jan 18, 2005 at 08:57:17AM -0800, Richard S. Crawford
> (rscrawford at mossroot.com) wrote:
> > I started playing with PGP over the weekend, and I'm having fun
> > using KMail at home to sign my e-mail and encrypt documents and
> > generally have a good time.
> > 
> > But since I use at least three different computers to access and
> > send e-mail and documents -- my FC3 desktop, my WinXP/FC3 laptop,
> > and my Win2K desktop at work -- how would I address the issue of
> > signing e-mails when my secret key is only on one of those three
> > machines? Would I use a different key?  I certainly don't feel
> > comfortable copying the secret key from one computer to another,
> > even over SSH, since that feels like defeating the purpose to me.
> > 
> > ...Or am I missing something fundamental about how all this works?
> > 
> > (Obviously, since this e-mail is sent via Squirrelmail from my
> > desktop at work, it's not signed.)
> 
> My own preferred option is to have a remotely accessible shell account
> with which I can access email and signing keys.  Not always possible,
> and yes, this has its own disadvantages (do you trust the link between
> yourself and the remote host for your passphrase?).
> 
> Another option is signing subkeys.
> 
> 
> Note that this only works for _signing_ outbound email.  Reading
> encrypted email requires you have the key the sending party used.  
> 
> However, you can generate subkeys of your own signature which _you_
> can use to _send_ signed mail from various hosts.
> 
> More on this:
> 
>     http://fortytwo.ch/gpg/subkeys
> 
> ...or Google around.
> 
> Haven't used it myself.  Might make a neat talk topic ;-)

So that's why subkeys.pgp.net has that name -- because it's the set of
all keyservers that can handle the (newer) subkey features of GPG.

--Ken Bloom

-- 
I usually have a GPG digital signature included as an attachment.
See http://www.gnupg.org/ for info about these digital signatures.
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