Access control Computer networks Security measures Computers 11 Computer security 9 Passwords 6 Data protection 3 Biometric identification 1 Data encryption (Computer science) 1 Dislocation 1 Dissertations 1 Dissertations, Academic 1 Electronic mail messages 1 Enterprise application integration (Computer systems) 1 Instant messaging 1 Internet 1 Intrusion detection systems (Computer security) 1 Machine learning 1 Public key infrastructure (Computer security) 1 Shoulder joint 1 Web services 1