Security measures Computer networks 11 Computer security 8 Cryptography 8 Quantum communication 6 Quantum theory 5 Data encryption (Computer science) 4 Electronic funds transfers 3 Information technology 3 Internet 3 Data protection 2 Mobile computing 2 Telecommunication 2 Access control 1 Algorithm 1 Algorithms 1 Android (Electronic resource) 1 Application software 1 Atmospheric effects 1 Automatic control 1 Automation 1 Banks and banking 1 Blockchains (Databases) 1 Bluetooth technology 1 Buildings 1 Business communication 1 Ciphers 1 Coding theory 1 Computer algorithms 1 Computer network protocols 1