Electronic authentication, identification and verification of persons and users as well as advice in this regard; software development; security of computer systems through authentication of persons and users; providing software interfaces available over a network to provide personal access to a global computer information network; security services for protection against illegal access to networks; user and rights management in computer networks, namely identity checking, authorization, identification, verification and authentication of digital or electronic signatures and underlying certificates and for protocolling of communication processes; verification of users' identities over the Internet; providing temporary use of non-downloadable software; platform as a service (PaaS) services, namely providing software on platforms that allow users to access and use software, computer networks, computer servers and computer and data storage systems; providing software in the context of so-called software as a service (SaaS) services, in particular in the field of electronic authentication, identification and verification of persons and users.