PGP

New key

The key (from pgp.net)
key id: 9742192F
fingerprint: 3798 D146 5DC6 8B52 A4B7 450F 93B6 1004 9742 192F
Who signed this key?

Old key

The key (from pgp.net)
key id: D204D443
fingerprint: 8C36 AC25 B5C0 3EE0 2D89 EDBD B2E5 B891 D204 D443
Who signed this key?
Even more informations

If you don't know what PGP is, then read this article by Thomas Bader.