Debian Key System

Wer kennt das nicht unter Debian :
W: GPG error: http://ftp.tiscali.de stable/non-US Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY F1D53D8C4F368D5D
Hier die Lösung :

gpg --keyserver pgp.mit.edu. --recv-keys F1D53D8C4F368D5D
gpg -armor --export F1D53D8C4F368D5D | apt-key add -