[Qgis-user] GPG Error - public key is not available - reg.

[Andreas Sauter]

Hi all,
qgis was running without problems for a few month now, but since a week 
i get an error massage when ubuntu 12.04 trys to update via the update 
manager.

its an error with the public key, but i dont know how to fix it.

GPG-Fehler: http://qgis.org precise Release: Die folgenden Signaturen 
konnten nicht überprüft werden, weil ihr öffentlicher Schlüssel nicht 
verfügbar ist: NO_PUBKEY EBB1B7ED997D3880


what can i do?

Thanks
Anz