Impact of ROCA (CVE-2017-15361) in subkey vs. private key?
peter at digitalbrains.com
Tue Oct 31 12:01:37 CET 2017
On 31/10/17 11:56, Lachlan Gunn wrote:
> The only difficulty is when the owner doesn't have the secret key
> anymore, and so can't re-revoke it. Then you might want to keep it from
> being disseminated further.
Revocations are done by the primary key. If the user has lost the secret
primary, they should fetch their revocation certificate, not fool around with
the subkeys ;-). (Incidentally, this is why you don't need revocation
certificates for individual subkeys.)
I'm glad we agree, because I didn't sleep so well and I see I'm making mistakes
:-D. The  in:
I suppose a system checking for ROCA might rightfully take offense at a subkey
revoked as "superseded" or "lost", because with ROCA it is actually
should have been a footnote:
 Lachlan indicates "lost" is also treated as "signatures before revocation
date remain valid", but I haven't checked myself.
I use the GNU Privacy Guard (GnuPG) in combination with Enigmail.
You can send me encrypted mail if you want some privacy.
My key is available at <http://digitalbrains.com/2012/openpgp-key-peter>
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