Computer security Security measures Computer networks 30 Access control 8 Data protection 7 Computers 5 Passwords 4 Data encryption (Computer science) 3 Firewalls (Computer security) 3 Mobile computing 3 Cloud computing 2 Electronic mail messages 2 Instant messaging 2 Internet 2 Intrusion detection systems (Computer security) 2 Anomaly detection (Computer security) 1 Application program interfaces (Computer software) 1 Bluetooth technology 1 Computational grids (Computer systems) 1 Computer algorithms 1 Computer crimes 1 Computer network protocols 1 Computer viruses 1 Database security 1 Dislocation 1 Enterprise application integration (Computer systems) 1 Evaluation 1 Identification cards 1 Image processing 1 Information networks 1