Secure Boot Technical Details

The signed-chain staging, kernel signing and verification steps work the same way on both versions, with one significant exception: on 1.5 none of it is staged at all if httpproto=https, because that version has no way to combine HTTPS netboot with Secure Boot. The TFTP staging paths also differ slightly.

Which version am I on?

Check FOG Configuration → FOG Settings → General → FOG_VERSION in the web UI, or the version string printed at the top of installfog.sh.