Hack4 has announced its Call For Papers. It will be held December 29th through the 30th, 2014 in Berlin, Germany.
You can download it from the following link: https://packetstormsecurity.com/files/download/129352/hack4-cfp.txt
Source: https://packetstormsecurity.com/files/129352/Hack4-Call-For-Papers.html