Along with the many opportunities that Big Data provides to users (business users and individuals), it brings many threats to society, businesses and individuals. At the same time, Big Data Anapytics has established itself as an effective tool in many areas of modern information processing, including the area of information security. Big Data technologies used in security systems are able to detect threats in advance. By providing tools for collecting and analysing large amounts of digital information generated from different sources or recorded by different devices, BDA helps to detect and define patterns and trends of malicious behaviour, search for methods to track cybercriminals, predict and stop potential cyber-attacks. This report focuses on the problems and challenges of protecting Big Data in these two aspects.