I have begun to build signed kernel modules for Fedora 18 and the dahdi-linux-kmod package.

The initial changes to the spec file are shown here. Beginning with the Fedora 18 builds of dahdi-linux-kmod-2.6.2-0.2.rc1 (and greater), the kernel modules will be signed with the Messinet Secure Services kernel module signing key. See the Fedora & Enterprise Linux RPM Repository for more information.