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1answer
19 views

Verify a key was signed by another key

I began using GPG4Win/Kleopatra, the GNU Privacy Guard implementation for Windows. More recently I wanted to verify a download of Qubes OS, for which a guide is offered here. They describe a master ...
3
votes
1answer
15 views

Does it matter what version of GnuPG I use to create revocation certificates?

Today I am about to create a bunch of revocation certificates for all of my emails. Why? Because it already happened to me in the past, that I lost my private key, or my computer was compromised. It ...
1
vote
1answer
13 views

Why does the revocation sent to the OpenPGP keyservers not show up?

I have created a new OpenPGP key pair. So I wish to revoke the former I used. Here's what I managed to do so far: This way I found that email's ID = 3C76732B gpg --search ...
1
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1answer
15 views

What is the purpose and meaning of the --sig-notation and --cert-notation options in GnuPG?

What is the purpose of the --sig-notation and --cert-notation options in GnuPG? What are the intended use cases? In the first part the a @ character is used, so I guess the options are for providing ...
2
votes
1answer
19 views

How to import primary secret key from backup into GnuPG?

I've seen "Re-import secret primary key in GnuPG" which is pretty much the issue I'm seeing, but I haven't had any luck with GnuPG 1.4.20 (from GPGTools) or GnuPG 2.1. Even if I delete my entire ...
4
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1answer
23 views

Best practice: Should I revoke an identity self-signed using SHA1?

When I first created by PGP keypair, my identity was unfortunatly self-signed using SHA1. I later signed again using SHA512. Does it make sense to revoke the SHA1 signature now or will that just ...
1
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0answers
19 views

gpg 2.0 command line option to create UTF-8 data

With echo text | gpg2 --sign --textmode -a I can create messages with a one pass signature containing a Literal Data packet in TEXT ('t') format. If I skip the --textmode option it will generate ...
3
votes
2answers
100 views

Why does my private OpenPGP key look different between devices?

Something I noticed, when I use gpg --export-secret-keys -a on different computers: My private key looks different, even though they are the same key pair. Is that normal or does this indicate ...
3
votes
1answer
21 views

How to get GnuPG fingerpints only for specified key name, not for substring matches?

I have few GnuPG keys: test, test2, some test. When I invoke gpg --fingerprint test, fingerprints of all keys are listed. When I run gpg --fingerprint test2, only test2 key fingerprint is printed. How ...
6
votes
2answers
362 views

Am I weakening symmetric OpenPGP encryption by deploying a custom pre-derivation?

I often use GnuPG to encrypt files with a passphrase. I'm very paranoid, and afraid that the key derivation used by GnuPG isn't slow enough. For this reason, I've decided to do my own key derivation ...
3
votes
1answer
23 views

Critical sub-packets in OpenPGP not used

OpenPGP in RFC4880 allow to tag signature sub packets as "critical" by setting the high bit 7 in the packet type. I checked a few keys generated with GnuPG2 and all the sub packets are not critical, ...
2
votes
1answer
51 views

What is the recommended procedure to migrate to a new OpenPGP master key?

I am thinking about starting again with a new master key. My current master key was not compromised, but I had stored it on my private server temporarily, which is against good practices (but I am the ...
2
votes
0answers
30 views

GPG Public Key changes after removing master key [closed]

Why does my gpg public key change after removing my master key (leaving just my subkeys) from the gpg key ring? I'm doing this so i can move my daily use keys (subkeys) to my online machine while ...
1
vote
1answer
33 views

Can an OpenPGP master key decrypt something encrypted for a subkey?

When creating OpenPGP subkeys, the master key signs and certifies that a subkey belongs to that master key. Can be used master key to decrypt something encrypted using an encryption subkey? I guess ...
1
vote
1answer
31 views

OpenPGP master key with certificate and authentication capabilities (on a smartcard)

After researching about OpenPGP and smartcards, I came to a dilemma. The usual setup I've seen more widely is a master key (with SC capabilities) and 3 subkeys (with S, E, A each): pub ...
0
votes
3answers
57 views

Is there use for GPG/PGP for casual people who are simply concerned for their privacy?

GPG seems to be something that would be important to people who communicate to a particular person and have to keep their privacy and/or security. But what if I'm just a casual user who's aware that ...
3
votes
1answer
83 views

Verifying a downloaded file with gpg

I'm trying to follow the instructions to verify a downloaded file here: http://www.pps.univ-paris-diderot.fr/~jch/software/pgp-validating.html Get a local copy of the signing key You will ...
1
vote
2answers
56 views

PGP Key Signing Robot DKIM Verified Emails

It occurred to me that DKIM verified emails, from major players (e.g., GMail), could open the door to more modern OpenPGP robot key signing authorities. The idea would be to ask people to send a key ...
2
votes
1answer
271 views

Make signed file from content file and its detached signature?

I have a text file which I will call filename.txt. Firstly I call gpg --output filename.asc --clearsign filename.txt Signed file filename.asc is created. Then I call gpg --armor --output ...
-1
votes
1answer
86 views

Why are pgp keys limited to a number of bits?

I am wondering : why does pgp keys have a fixed number of bits. They can be 2048,4096, but why not 56000 or 23 bits ? Is there a specification, or ISO, that was made to limit thoses Keys. Why? If a ...
4
votes
2answers
118 views

Should I add picture(s) to my OpenPGP key?

I'm toying with the idea of creating a pair of OpenPGP keys, and I'm wondering if I should include a picture or two. I know it will make my key a lot bigger, but is it still worth it? I'm thinking of ...
3
votes
2answers
79 views

How to verify email addresses in GnuPG UIDs?

I have been reading up on key signing policies and best practices. Something I have been unable to figure out is how to verify the email address attached to a UID of a GnuPG key. I can verify the ...
32
votes
2answers
9k views

How many OpenPGP keys should I make?

I am learning how to use OpenPGP keys in GnuPG, and I am wondering what is the threshold people generally use to maintain separate OpenPGP keys. Maintaining an incredibly large number of keys is not ...
20
votes
3answers
4k views

Does OpenPGP key expiration add to security?

I've created a new OpenPGP key to sign a software package in a source repository with an expiration date three years from now. It seemed like a good security measure, because if the key is compromised ...