Access control 49 Computers 31 Security measures 22 Computer networks 17 Computer security 15 Data protection 9 Dissertations 8 Dissertations, Academic 8 Passwords 8 Cryptography 4 Data encryption (Computer science) 4 Public key infrastructure (Computer security) 4 Data processing 3 Information storage and retrieval systems 3 Internet 3 Management 3 Mobile communication systems 3 Cell phones 2 Code division multiple access 2 Electronic information resources 2 Medical records 2 Privacy, Right of 2 Standards 2 Wireless LANs 2 Wireless communication systems 2 Algorithms 1 Biometric identification 1 Business records 1 Cell phone systems 1 Censorship 1