In the paper are presented solutions for securing the core University Business Processes. A Method for identification which Business processes are critical for security point of view, on which is required to pay more attention for its securing. For securing of the elected Business processes is developed a new security system – Extended Certification Authority. Special Secure eDocument Management Architecture is developed, on which base are developed the solutions for securing the following University Business processes - Delegation of exam permissions to lecturers, Recording exam marks, and Exchange management documents.