xSTF (Extreme Security Task Force) was created as a CTF team in 2015 at Departamento de Ciência de Computadores da Faculdade de Ciência da Universidade do Porto (DCC-FCUP). Most members are computer science, mathematics or infosec students from the University, we also count with the help of some professors, like our team captain 0xacb. We play CTFs regularly and we’ve hit the top 100 on ctftime.org several times, our dream goal is top 10 :)