Access control Computers 25 Security measures 20 Computer networks 14 Computer security 11 Data protection 9 Passwords 7 Cryptography 4 Data encryption (Computer science) 4 Public key infrastructure (Computer security) 4 Information storage and retrieval systems 3 Management 3 Mobile communication systems 3 Cell phones 2 Code division multiple access 2 Dissertations 2 Dissertations, Academic 2 Electronic information resources 2 Privacy, Right of 2 Wireless LANs 2 Wireless communication systems 2 Algorithms 1 Biometric identification 1 Business records 1 Cell phone systems 1 Code words 1 Communication systems 1 Computer 1 Computer crimes 1 Criminal justice, Administration of 1