Re: Revocation certificate for sub key?

2013-12-14 Thread NdK
Il 13/12/2013 23:56, adrelanos ha scritto:

 Is it possible to create a revocation certificate just for sub keys and
 not the master key?
I can't see how it can be useful...

 This would be useful for offline master keys. Trusted persons could be
 given the revocation certificate for sub keys and send it to key servers
 when they suspect compromise. But should the sub key revocation
 certificate get into the wrong hands due to compromise, the damage would
 be limited.
Since you still have your secure offline main key, you can revoke
subkeys yourself... Or am I missing something?

BYtE,
 Diego.

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Re: Revocation certificate for sub key?

2013-12-14 Thread adrelanos
 This would be useful for offline master keys. Trusted persons could be
 given the revocation certificate for sub keys and send it to key servers
 when they suspect compromise. But should the sub key revocation
 certificate get into the wrong hands due to compromise, the damage would
 be limited.
 Since you still have your secure offline main key, you can revoke
 subkeys yourself... Or am I missing something?

Others may be able to do that faster.

That time advantage might result in much less damage when it comes to
important keys, such as linux distribution signing keys.

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Re: Revocation certificate for sub key?

2013-12-14 Thread adrelanos
 Am Fr 13.12.2013, 22:56:07 schrieb adrelanos:
 Hi,
 
 Is it possible to create a revocation certificate just for sub keys and
 not the master key?
 
 --edit-key 0x12345678
 key 1
 revkey

That's doesn't create a revocation certificate, that revokes the key.

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Re: Another step towards crowdfunding

2013-12-14 Thread Sam Tuke
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256

Thanks for your carefully considered input Micah.

On 13/12/13 22:23, Micah Lee wrote:
 I tweeted the video and it's getting some pickup:
 https://twitter.com/micahflee/status/411569314097934336

Awesome!

 One way that I think the blog could be improved is by providing permalinks
 for the individual posts.

This has been on the todo list for a while (the blog is all static hand
written HTML at the moment). I made separate pages as requested just now and
they're online. Should make linking easier (just click on the article headings
on the blog front page).

 Looking back through this list archives it appears that this fundraising 
 campaign actually has a matching grant, to use non-profit development 
 language? Each donation is doubled?

No we don't have a sponsor offering that at the moment (I'd be delighted if we
did). Which archived mail gave you that impression?

 In the video you say that GPG is used by the government, hackers, and 
 billion dollar companies. I think when promoting GPG it's good to include
 in that list activists, journalists, whistleblowers, and ordinary people
 that care about privacy. I think you can brag about widespread use amongst
 this same set of people: https://www.torproject.org/about/torusers.html.en

Good point, I'll speak to Anna who made the video about getting it changed.

 Finally, if you're raising money to rebuild the website, could you add 
 HTTPS to your to do list?

I guess you're referring to the blog (gnupg.org is HTTPS accessible, but
blog.gnupg.org is not)? The new site will host the blog on a single (not sub)
domain, so all pages will be reachable by an encrypted connection. Does that
answer your question?

Best,

Sam.


- -- 
Sam Tuke
Campaign Manager
Gnu Privacy Guard
Tel: +49 176 81923811
IM: samt...@jabber.fsfe.org
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Re: Revocation certificate for sub key?

2013-12-14 Thread Daniel Kahn Gillmor
On 12/14/2013 12:01 PM, adrelanos wrote:
 [hauke wrote:]
 Am Fr 13.12.2013, 22:56:07 schrieb adrelanos:
 Hi,

 Is it possible to create a revocation certificate just for sub keys and
 not the master key?

 --edit-key 0x12345678
 key 1
 revkey
 
 That's doesn't create a revocation certificate, that revokes the key.

If you are comfortable with either the GNUPGHOME environment variable or
gpg's --homedir option, you should be able to make what you're looking for:

Make a new temporary gnupg homedir.  import your primary secret key and
your subkey into that homedir.  from that homedir, take Hauke's advice
and then export the key to a text file someplace safe.  this text file
will contain the revocation for the subkey.  delete/purge/get rid of the
temporary homedir.

if/when you need to revoke your subkey, you can just gpg --import the
stored text file, and then --send-key to push it to the public keyservers.

does this make sense?

--dkg

PS your e-mail client appears to be breaking message threading (no
In-Reply-To: or References: headers), and fails to provide attribution
for your quoted text (i had to re-insert that hauke was the source of
the good advice above).  This makes it more difficult for people to
carry on a conversation with you over e-mail.  Please consider fixing
your client or choosing a different one that supports proper message
threading and attribution.  thanks!



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Re: Sharing/Storing a private key

2013-12-14 Thread Leo Gaspard
On Fri, Dec 13, 2013 at 12:12:12PM +0100, Mindiell wrote:
 Hello,
 
 I'm using GPG regularly and did want to save my private key.
 
 [...]
 
 I found  (http://point-at-infinity.org//) too, but it wasn't
 really usable beacause it has too many limitations IMHO.
 
 So I did it myself : ShareIt (https://gitorious.org/shareit)

 [...]
 
 It is using the Shamir's Sharing Secret Algorithm
 (http://en.wikipedia.org/wiki/Shamir%27s_Secret_Sharing).
 
 [...]

 Any Comments and/or critics are more than welcome, especially on security
 issues.

AFAIK,  *is* an implementation of SSS. So, why would you write a new
version?

I must say I didn't look at the source, as I do not see the point at first.

So, this is a warning about security issues : something you made yourself is
likely to be unsafe. A tested implementation exists.

Maybe is there really a point in writing it, but I can't see which. Maybe if you
explained what the limitations of  are...?

HTH,

Leo

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Re: Another step towards crowdfunding

2013-12-14 Thread Zechariah Seth

 On Fri, 13 Dec 2013 17:05, christophe.bro...@cnamts.fr said:
 
  * a very lean and clean GnuPG blog design :) and excellent promotional 
  video !
 
 I was somehow able to convice Sam not to install Wordpress like blogging
 software right now. Which also means that for comments you need to
 resort to gnupg-users ;-).

Will GnuPG blogs be cross-posted to the gnupg-users list? :)

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Re: Revocation certificate for sub key?

2013-12-14 Thread Hauke Laging
Am Sa 14.12.2013, 17:01:23 schrieb adrelanos:
  Am Fr 13.12.2013, 22:56:07 schrieb adrelanos:
  Hi,
  
  Is it possible to create a revocation certificate just for sub keys and
  not the master key?
  
  --edit-key 0x12345678
  key 1
  revkey
 
 That's doesn't create a revocation certificate, that revokes the key.

It does create a revocation certificate. But it imports it automatically. 
There is a simple solution, maybe (matter of taste) easier than dkg's 
proposal:

Make a backup of the key (i.e. export both secret and public key), do the 
above, export the certificate (public key), delete both secret and public key 
and import your backup. The exported certificate contains the revocation 
certificate.

You may reduce the file by deleting all but one UIDs and all other subkeys 
after the backup and before the revkey.


Hauke
-- 
Crypto für alle: http://www.openpgp-schulungen.de/fuer/unterstuetzer/
http://userbase.kde.org/Concepts/OpenPGP_Help_Spread
OpenPGP: 7D82 FB9F D25A 2CE4 5241 6C37 BF4B 8EEF 1A57 1DF5


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