Germany's interior minister has said stolen files detailing thousands of recruits to the Islamic State group can be assumed to be genuine. <br /> <br />Thomas de Maiziere said the information could help with prosecutions of IS fighters, and help prevent future recruitment to the militant group. <br /> <br />The files obtained by German and UK media are said to identify IS recruits from 50 countries. <br /> <br />They contain names, addresses, phone numbers and skill sets.