Linked Questions

8
votes
3answers
1k views

GnuPG warning for a signed key with trust level 4

When encrypting a document with a public key I got a warning: $gpg --encrypt -r 6B7F10E4 file.pdf It is NOT certain that the key belongs to the person named in the user ID. If you *really* know ...
19
votes
2answers
22k views

GnuPG asks for a key ID when sharing my public key, what is that?

I generated a public key using GnuPG. I can see it using --list-keys $ gpg --list-keys /Users/mertnuhoglu/.gnupg/pubring.gpg ------------------------------------- pub 4096R/CB3AF6E6 2015-12-24 [...
5
votes
2answers
6k 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 ...
3
votes
2answers
680 views

Will the OpenPGP key fingerprint change if the certificate is extended?

Should the fingerprint of a renewed (extended) OpenPGP Key be the same? Is there any documentation on it (RFC)? Quoting from RFC 4880: There are many ways possible for two keys to have the same ...
36
votes
1answer
19k views

Short OpenPGP key IDs are insecure, how to configure GnuPG to use long key IDs instead?

Short OpenPGP key IDs (with 32 bits / 8 hex characters) are subject to collision attacks. It is strongly recommended to stop using 32 bit IDs: Stop using 32bit key ids It takes 4 seconds to ...
7
votes
1answer
318 views

Help - Somebody stole my OpenPGP key ID, what can I do?

I received a key transition statement because somebody found himself in the exact same situation described here. This issue will target more and more OpenPGP users in future, probably even all of them....
3
votes
1answer
206 views

Combating Networks of Forged OpenPGP Keys on Public Keyservers

I recently noticed that someone has created an elaborate forgery of my OpenPGP key. Specifically, they orchestrated a short key (32-bit) fingerprint collision, and also forged additional keys to match ...
1
vote
1answer
657 views

Verify GnuPG download with signature file - and it fails

I'm trying to verify the new GnuPG download (for OS X) using GnuPG. (First of all I'm not sure if you should verify a file with the old version of it, which I probably didn't verify back then to be ...
0
votes
1answer
69 views

What are the Consequences of OpenPGP Key Collisions?

In this answer to GPG keys & SHA-1, there's the sentence: However, since PGP keys are usually generated by their users, collision attacks are not a problem. They might conceivably be a problem ...