German ct magazine postulates death of pgp encryption
Christoph Anton Mitterer
calestyo at scientia.net
Fri Feb 27 21:24:11 CET 2015
On Fri, 2015-02-27 at 20:56 +0100, Werner Koch wrote:
> There is no trust in keyservers by design. As soon as you start
> changing this you are turning PGP into a centralized system.
Well not necessarily - at least not in the sense of exactly one power
having control over the whole key network (as it would be the case in
IMHO the current situation with keyservers isn't perfect:
- Usually (AFAIK), only one of them is used for queries/submissions...
if that one is evil, that you have a problem (at least until the next
- Nothing is authenticated (well there is hkps, but the problem here is,
that one single person holds the control over the effectively only
used CA... and while I don't think that Kristian is evil ;-) ... it's
a conceptual problem).
=> thus an attacker can easily do downgrade/blocking attacks... like
filtering out any revocation certs.
- Nothing is encrypted (so everyone eavesdropping will know that I just
downloaded the key for nsa-whistleblowers at wikileaks.org... and five
minutes later I'd be beaten to death).
Ideally, every keyserver would sign his responses (with OpenPGP of
course ;) )... and GnuPG/etc. would ship the keys of (at least some of)
This is of course some effort to collect/verify and even then Werner&Co
wouldn't know whether can for example trust me as a keyserver operator
or whether I'm secretly paid by the BND.
But(!) when each request (queries / submissions) would be made to a
handful of randomly chosen keyservers (say 20?), there are good chances
that at least some of them are not evil and any forgery would be at
Ideally, gnupg.org would then also run a keyserver, which is always
included in the list.
Why? Well most people don't audit the code of GnuPG, so when they trust
them already with respect to that, they can also trust them with respect
to a keyserver.
And people should be able to specify additional always-in-the-list
keyservers,.. like I would specify my own or ubuntu employees would
specify the one from canonical - if it's running ;) ).
As for the privacy component: The above schema obviously makes
encryption for privacy useless... (an other issues, like keyservers
doing caching, could also make it defeatable).
So I think the way to go here would be Tor.
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