GnuPG signature check failed on sshguard_1.4-2~bpo50+1_amd64.changes gpg: Signature made Sat Jan 23 05:55:04 2010 CET using DSA key ID B4BCA5D7 gpg: Can't check signature: public key not found (Exit status 2) sshguard_1.4-2~bpo50+1_amd64.changes has bad PGP/GnuPG signature! Removing sshguard_1.4-2~bpo50+1_amd64.changes, but keeping its associated files for now. Greetings, Your Debian queue daemon