
We have debian-security defined for mirroring in [1] with key C857C906; however we don't seem to be importing this key. Possibly it was manually imported on the old server and this has now gone missing on the new Xenial server. Import this key from https://ftp-master.debian.org/keys/archive-key-8-security.asc The keys are renamed to have "jessie" in it, to avoid confusion (see [2]) [1] http://git.openstack.org/cgit/openstack-infra/system-config/tree/modules/openstack_project/files/reprepro/debuntu-updates#n41 [2] https://ftp-master.debian.org/keys.html Change-Id: Iabfd5e3fa7aa39716a120998663f5ad0e30afe25