Access control 10 Computers 10 Passwords Computer networks 3 Security measures 3 Penetration testing (Computer security) 2 Apple Computer, Inc 1 Computer security 1 Data protection 1 Digital signatures 1 Information technology 1 Internet addresses 1 Kali Linux 1 Keystroke timing authentication 1 Macro instructions (Electronic computers) 1 Management 1 Ruby (Computer program language) 1