Why am I getting this error message when trying to update manager?

The action would require the installation of packages from not authenticated sources. apparmor apparmor-utils apport apport-gtk apport-symptoms apt apt-transport-https apt-utils aptdaemon aptdaemon-data base-files colord coreutils firefox firefox-branding firefox-globalmenu firefox-gnome-support firefox-locale-en gir1.2-gudev-1.0 gir1.2-javascriptcoregtk-3.0 gir1.2-webkit-3.0 gnome-power-manager icedtea-6-jre-cacao icedtea-6-jre-jamvm jockey-common jockey-gtk landscape-client-ui-install libapparmor-perl libapparmor1 libapt-inst1.4 libapt-pkg4.12 libc-bin libc-dev-bin libc6 libc6-dev libcolord1 libgl1-mesa-dri libgl1-mesa-glx libglapi-mesa libglu1-mesa libgnomecanvas2-0 libgnomecanvas2-common libgudev-1.0-0 libjavascriptcoregtk-1.0-0 libjavascriptcoregtk-3.0-0 libldap-2.4-2 libnautilus-extension1a libparted0debian1 libudev0 libwebkitgtk-1.0-0 libwebkitgtk-1.0-common libwebkitgtk-3.0-0 libwebkitgtk-3.0-common libxatracker1 libxcb-dri2-0 libxcb-glx0 libxcb-render0 libxcb-shape0 libxcb-shm0 libxcb1 lsb-base lsb-release mktemp multiarch-support nautilus nautilus-data openjdk-6-jre openjdk-6-jre-headless openjdk-6-jre-lib parted python-apport python-aptdaemon python-aptdaemon-gtk python-aptdaemon.gtk3widgets python-aptdaemon.gtkwidgets python-aptdaemon.pkcompat python-problem-report thunderbird thunderbird-globalmenu thunderbird-gnome-support thunderbird-locale-en thunderbird-locale-en-gb udev unity-greeter update-notifier update-notifier-common xserver-xorg-input-wacom