Access control 220 Computers 202 Computer security 121 Security measures 98 Computer networks 74 Cryptography 37 Data encryption (Computer science) 31 Computer 18 Data protection 18 Internet 15 Firewalls (Computer security) 14 Passwords 10 Electronic data processing departments 9 Information storage and retrieval systems 9 Database security 7 Intranets (Computer networks) 7 Public key cryptography 7 Data transmission systems 6 Snort (Computer file) 6 TCP/IP (Computer network protocol) 5 Access Control 4 Automotive computers 4 Electronic information resources 4 Embedded computer systems 4 Internet (Computer network) 4 Microsoft Windows (Computer file) 4 Operating systems (Computers) 4 Penetration testing (Computer security) 4 Standards 4 Certification 3