hack4 has announced its Call For Papers. It will be held December 29th through the 30th, 2016 in Berlin, Germany.
You can download it from the following link: https://packetstormsecurity.com/files/download/138869/hack42016-cfp.txt
Source: https://packetstormsecurity.com/files/138869/hack4-2016-Call-For-Papers.html