The assessment of security risks, challenges and threats is the first step in developing strategic documents in the field of security and defense. The Republic of Serbia does not still have a defined cyber defense strategy and the adequate legal framework for its planning and implementation. When developing strategic and normative documents, it is important to take into account the specifics of cyber space and cyber weapons. The principles and legality that are applied in the physical world are generally different from those in the cyber world. This second, virtual world, is characterized by insecurity and coincidence as the important features. This results in difficulties related to the inability to reach an adequate level of certainty nec...