Dib2Qm (aka Dibdib Messenger) Messenger for secured chats and groups (end-to-end encrypted). Dib2Qm was (!) a messenger that works via e-mail servers, end-to-end encrypted. - Deprecated. - Please do not use this app any longer, unless you have a very specific need. - If so, please get in touch with gxworks at mail . de. - Otherwise, use such apps as deltaChat, SimpleX etc. - (Why? This app was a proof-of-concept that turned out to be useful ...) - (... useful - as long as no other similar app provided for those needs) - (... which is, fortunately, no longer the case)