In a big crackdown on terrorist activities, the Centre has banned 14 mobile messaging applications which were allegedly being used by terror groups, largely in Jammu and Kashmir, to communicate with their supporters and Over Ground Workers (OGW) and also receive instructions from Pakistan, sources said. The banned apps include Crypviser, Enigma, Safeswiss, Wickrme, Mediafire, Briar, BChat, Nandbox, Conion, IMO, Element, Second Line, Zangi, and Threema. The action was taken on the recommendation of security and intelligence agencies.