The paper shows the possibilities and ways to protect e-data in sensitive information systems such as financial information system and health information system. Nowadays, when the health information system and financial information system are developed and contain large amounts of data in the database, it is necessary to pay great attention to computer security, computer security mechanisms which enable the protection of electronic data, e.g. patient’s diseases and clients' financial transactions. The aim of the paper is to present the best way of protecting e-data in the database from malicious people, i.e. malicious users of these systems, and from the deterioration and obsolescence of data storage media with the data important for the organization itself by making recommendations and showing the ways of their protection. This paper, among other things, explains the reason for creating a code of ethics for medical and health IT professionals. The information collected by using the questionnaire is shown. On the basis of this information, it can be concluded that most organizations use scanners and cameras to digitize documents, which are then usually stored in .pdf, .doc, .docx, and xml formats. The results of the research, which was conducted during the period of three weeks in 2012 on the sample of seven organizations, show that there is no organization that does not have a general policy of preserving the material in electronic form. A recommendation for the organizations is made in the conclusion – to back up electronic databases more often, or as many times as possible in the shortest period of time possible. The research presented in this paper, when it comes to collaboration in the development of the programs intended for preservation, shows that the most common form of collaboration is of local character.
