Computer security Security measures 56 Computer networks 42 Data protection 21 Access control 15 Data encryption (Computer science) 14 Computers 11 Dissertations, Academic 11 Dissertations 10 Cryptography 7 Information technology 5 Internet 5 Passwords 5 Data processing 4 Firewalls (Computer security) 4 Cloud computing 3 Computer algorithms 3 Computer crimes 3 Computer hackers 3 Computer network protocols 3 Image processing 3 Intrusion detection systems (Computer security) 3 Mathematical models 3 Mobile computing 3 Online social networks 3 Technological innovations 3 Administrative agencies 2 Auditing 2 Civil service 2 Computational grids (Computer systems) 2