GnuPG signature check failed on fwknop_1.9.10-1~bpo50+1_amd64.changes gpg: Signature made Sun Mar 8 22:24:45 2009 CET using DSA key ID 19D03486 gpg: Can't check signature: public key not found (Exit status 2) fwknop_1.9.10-1~bpo50+1_amd64.changes has bad PGP/GnuPG signature! Removing fwknop_1.9.10-1~bpo50+1_amd64.changes, but keeping its associated files for now. Greetings, Your Debian queue daemon