This author has not been identified. Look up 'Michael Till Beck' in GoogleThis author has not been identified. Look up 'Jan Camenisch' in GoogleThis author has not been identified. Look up 'David Derler' in GoogleThis author has not been identified. Look up 'Stephan Krenn' in GoogleThis author has not been identified. Look up 'Henrich C. Pöhls' in GoogleThis author has not been identified. Look up 'Kai Samelin' in GoogleThis author has not been identified. Look up 'Daniel Slamanig' in Google