Lightweight EAP, a proprietary Cisco protocol for WLANs (that until very recently did not have any reference implementations or third-party support). It started out as a stopgap measure until full 802.1X support arrived, but given the inordinate mess of 802.1X variations, it was adopted by many companies as "the lesser evil", on the (dubious) grounds that simple security backed by a single big vendor is better than overly complex security backed by many slightly incompatible third parties.