It seems that the problem isn't with the key, but the repository name. http://techabyte.com.au/index.php?threads/gpg-error-http-www- openprinting-org-lsb3-2.256/
Quote: Edit the file /etc/apt/sources.list and change: deb http://www.openprinting.org/download...driver/debian/ lsb3.1 gutenprint to this: deb http://www.openprinting.org/download/printdriver/debian/ lsb3.2 main -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1208582 Title: [Lubuntu 13.10] Wrong GPG-Key at openprinting.org To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lubuntu-meta/+bug/1208582/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs