Can I have two very different public keys?

Gpg4win help-en
1

I have the public key I generated using PGP in 2006: PGP PUBLIC KEY BLOCK-----Version: PGP for Personal Privacy 5.0. It is working without problems.

I’m teaching someone how to use Kleopatra, so I exported my public key going through the steps with her over the phone. The PGP PUBLIC KEY BLOCK-----Version: GnuPG v2.0.20 (MingW32) that was generated is much longer than the old one.

I’m confused. Can they both be valid public keys?

2

If they both work, and can be managed within Kleopatra, they’re both valid. Perhaps the earlier one is RSA-1024, and the recent one RSA-2048? Have a look at the certificate details, and see how they differ.

3

If it is the same key, the longer key size may be due to additional information being added to the key, such as signatures.