I'm finding nothing related to uck in VRALEC. (although I didn't look at HiddenMenu yet from this rom)
I've got many of the stock roms up on my goo.im if anyone wants to look through them:
You can also get them here:
EDIT: No SecureBootMenu in VRALEC's HiddenMenu...
Odds are we won't find this lib in any of the roms, if it does happen to be in one, chances are it was left by mistake.