Computer security Security measures 1.145 Computer networks 904 Data protection 326 Cryptography 194 Computer crimes 182 Access control 157 Computer hackers 146 Data encryption (Computer science) 142 Information technology 121 Management 118 Internet 113 Computers 111 Examinations 97 Certification 86 Investigation 82 Electronic data processing personnel 72 Computer software 61 Prevention 60 Data processing 49 Microsoft Windows (Computer file) 47 Forensic sciences 46 Development 44 Business enterprises 40 Computer viruses 35 Electronic data processing 35 Evaluation 35 Operating systems (Computers) 34 Study guides 32 Digital watermarking 31