Security measures Computer networks 263 Computer security 193 Data encryption (Computer science) 81 Access control 61 Internet 49 Data protection 47 more ... Electronic commerce 27 Wireless communication systems 27 Cryptography 23 Computers 21 Telecommunication systems 17 Telecommunication 14 Information technology 13 Business enterprises 11 Management 11 Data transmission systems 10 Prevention 10 Public key infrastructure (Computer security) 10 Data processing 9 Computer crimes 8 Computer systems 8 Mobile computing 8 Sensor networks 8 Autonomic computing 7 Computer network protocols 7 Electronic data processing 7 Malware (Computer software) 7 Computer software 6 Cyberinfrastructure 6 less ...