http://www.debian.org/releases/stable/i386/ch06s03.html.en#ftn.id593125
maps LUKS to http://luks.endorphin.org/ .
$ host luks.endorphin.org
Host luks.endorphin.org not found: 3(NXDOMAIN)
Is http://en.wikipedia.org/wiki/LUKS a better mapping?