Access control Data protection Computers 7 Security measures 4 Computer networks 3 Computer security 3 Cryptography 2 Data encryption (Computer science) 2 Passwords 2 Privacy, Right of 2 Digital libraries 1 Electronic information resources 1 Electronic mail messages 1 Instant messaging 1 Law and legislation 1 Libraries 1 Logic, Symbolic and mathematical 1 Management 1 Modality (Logic) 1 Web applications 1 Web databases 1