$ apt-cache search --names-only linux signed
linux-signed-generic-lts-quantal - Complete Signed Generic Linux kernel and headers
linux-signed-image-3.5.0-19-generic - Signed kernel image generic
linux-signed-image-3.5.0-21-generic - Signed kernel image generic
linux-signed-image-3.5.0-22-generic - Signed kernel image generic
linux-signed-image-generic-lts-quantal - Signed Generic Linux kernel image
linux-signed-image-generic - Signed Generic Linux kernel image
linux-signed-generic - Complete Signed Generic Linux kernel and headers