Security measures 14 Telecommunication 14 Access control 7 Computer networks 4 Computers 4 Management 3 Telecommunication systems 3 Computer crimes 2 Computer security 2 Data encryption (Computer science) 2 Equipment and supplies 2 Internet 2 Virtual computer systems 2 Biometric identification 1 Cell phone systems 1 Communication planning 1 Cryptography 1 Customer relations 1 Digital computer simulation 1 Digital subscriber lines 1 Electronic surveillance 1 Evaluation 1 Fault tolerance (Engineering) 1 Government policy 1 Human-computer interaction 1 Information retrieval 1 Integrated services digital networks 1 Internet telephony 1 Internetworking 1 Intranets (Computer networks) 1