Developing concepts as well as software and hardware systems for providing security in information and communication technology, for electronic commerce (e-commerce) and for electronic payment of transactions; consulting with respect to aforementioned concepts and systems; services for protection of electronic communication processes in commerce and in private matters on the basis of cryptographic methods and authentication processes; creating and administrating certified keys and algorithms; authentication services, service of a trustee in connection with certified keys and algorithms including creating, administering, distributing and also certifying those pairs of keys which service is provided by the aforementioned trustee