Security measures Computer networks 38 Computer security 25 Data encryption (Computer science) 7 Internet 6 Data protection 5 Telecommunication 4 Thesis 4 Access control 3 Coding theory 3 Firewalls (Computer security) 3 Internet (Computer network) 3 Wireless communication systems 3 Business enterprise 2 Computer 2 Cryptography 2 Defense measures 2 Electronic data processing 2 Extranets (Computer networks) 2 Information technology 2 Problems, exercises, etc 2 Bluetooth technology 1 Book thefts 1 Certification 1 Computer hackers 1 Computer network 1 Computer networks Access control 1 Computer science 1 Computer software 1 Computers 1