Students are conversant with the concept of cryptography studies. They are introduced to different types of cryptosystems and basic levels of cryptanalytic attacks. The course deals with basics of modular arithmetic, the theory of numbers and the overview of algorithms for the factorization of large numbers. This way, students acquire necessary mathematical knowledge used in cryptography. Students are conversant with the basic characteristics of block cypher cryptography systems with and without the key, as well as techniques for forming digital signature and key exchange. Teaching units within the course: Classical cryptography (the history of cryptography, basic concepts, types of cryptography systems), Classical cryptography techniques (substitution ciphers, transposition ciphers and encrypters), Mathematical basics (Modular arithmetic, Euclid’s algorithm, Finite field, ECC, Group, ring and field), block ciphers and DES, AES, Symmetric algorithms – Symmetric cryptography, Pseudorandom number generators and Stream ciphers, Public key cryptography, asymmetric cryptography, RSA and Elgamal algorithm, key management, Hash functions, MAC and HMAC algorithms, PKI, steganography and cryptanalysis (Models and characteristics of cryptanalysis).

Students are conversant with the concept of operating systems. The objective of the course is to enable students to continue their studies in the field of the application software security, computer systems and networks, as well as gain qualifications for dealing with problems related to protection form cyber attacks and information security. Students are conversant with the basic concepts of OS security, memory protection, multitasking, system installation and the administration of the operating system itself. Teaching units within the course: The basics of computer hardware through RUN time of a program, Operating system of zero protection such as CPM, MSDOS, OS without protection), Memory protection and multitasking virtualization concept, Virtual operating systems, Improving operating systems, Initialization of an operating system, Database access control, System activity monitoring, OS installation, editing and updating , System backup.

The course deals with different aspects of network security. Mastering this course and the ability of applying the acquired knowledge after the completion of the course are necessary for understanding other courses within the study program. The objective of this course is to introduce students to the basic concepts and components necessary for the protection of networks, such as firewalls, routers, switchers, intrusion detection and protection systems, and logging infrastructures. During the semester students implement a project on analysis and usage of critical components of network security. This way students will prepare for further improvement in the field of network security. Teaching units within the course: At the beginning of the course, students will be conversant with the basic network tools, OSI model and ICMP protocol. They will also be conversant with a Proxy firewall, DMZ, IPS and IDS. They will also learn about packet filtering, dynamic packet filtering (ACL-RACL), IPTABLES commands, virtual private networks and wireless network security.

The objective of the course is that students prepare for research in the field of systematic control of a computer system and its content, with the aim of data gathering in case of a crime or other malpractice the computer is used for. After the completion of the course students will be able to understand the role of computer forensics in criminal investigations, they will also be able to apply the process of forensic analysis (finding and identifying digital proofs; storing digital proofs; analysis; presenting analysis results). Teaching units within the course: The basics of digital research (data analysis and the world of incidents). Analysis of permanent memory and analysis of permanent memory based on division. Analysis of system data files (FAT and NTFS concepts). NTFS concept and date structure, UFS and BSDFS concepts and analysis. Forensics of data storage devices based on the Linux platform. Mobile phones forensics, android forensics and forensics of PDA devices. Log files processing, Forensic tools used in investigations, Cybercrime Law and Criminal Law in the Republic of Serbia.

Ethics is part of a research project, from the phase of research topic suggestion to the end of the research project. Based on the data that is obtained, it is necessary to follow different regulations, such as regulations in the field of intellectual property, regulations in the field of protection of personal data, particularly General Data Protection Regulation (GDPR). Data security can be at risk by illegal access to vulnerable data, data change or other types of malpractice. The course deals with basic postulates of ethics in the field of data security, ethical, social and legal aspects of software development, organizational, security and legal issues in the field of data protection, as well as digital contracts.

The objective of the course is that students become conversant with the concept of blockchain technology in the context of information security, current security policy on the Internet, vulnerabilities of modern computer systems and technologies and attacks. The course enables students to recognize security problems related to blockchain technology and to find out how to achieve protection from attacks and how to protect information by using adequate mechanisms. After they successfully complete the teaching units and assignments within the course curriculum, students are expected to be able to apply acquired knowledge in practice. Teaching units within the course: Distributed systems and blockchain technology, consensus mechanisms in blockchain technology, smart contracts, symmetric cryptography, asymmetric cryptography, blockchain and Internet of things, current security attacks on systems, security ecosystem, blockchain security – confidentiality, integrity, availability, public key infrastructure, authentication by application of blockchain, blockchain as DNS server, blockchain against distributed DoS attacks.

Students will be conversant with the concept of security system management. The objective of the course is to enable students for further studies in the field of information security management system (ISMS), risk management as well as qualifications for professional work on ISO27000 standards implementing. Students are introduced to basic concepts of ISMS, its audit, management, operations, as well as its certification and development. Teaching units within the course: The basics of ISMS family, ISMS risk management, Risk management controls, ISMS operations, Performance evaluation, Accredited ISMS certification, Property management, Communications and operations management, Controls against malware and backup copies and network security management and media management, Information exchange and access control, Network access control and cryptography controls, as well as business continuity management, agreement and audit.