The call for papers for H2HC 12th edition is now open. H2HC is a hacker conference taking place in Sao Paulo, Brazil, from October 22nd through the 27th, 2015.
You can download it from the following link: https://packetstormsecurity.com/files/download/130697/H2H-CFP-2015.txt
Source: https://packetstormsecurity.com/files/130697/Hackers-2-Hackers-Conference-12-Edition-Call-For-Papers.html