Technology as an application of scientific and engineering knowledge to achieve practical results marks the present time and creates the foundations for the future. The Internet as its consequence connects the world and helps further its development and progress, the spread of knowledge and the promotion of equality. Personal data and their privacy have always been the subject of malicious attacks and in various ways people are trying to prevent their exploitation for unwanted purposes. Users as owners of such important data are required to focus their attention on protection and to know the legal framework in which they can act. Security of devices on which data is being kept, processed, and permanently stored is a subject prone to attack even when user is being cautious on how he shares his personal dana and is keeping an eye on what kind of information he shares publicly. Therefore, it is important to keep in mind how to prepare users for a security attack, which means about different ways of attack, attackers, what is a possible damage and how to defend yourself in case of aknowledged security attack.