Security measures Electronic commerce 8 Computer networks 5 Computer security 4 Electronic mail messages 4 Access control 2 Data protection 2 Design 2 Electronic information resources 2 Electronic mail systems 2 Information technology 2 Public key infrastructure (Computer security) 2 Smart cards 2 Spam (Electronic mail) 2 Banks and banking 1 Business enterprises 1 Cell phones 1 College students 1 Computer algorithms 1 Computer network resources 1 Consumer behavior 1 Consumer protection 1 Consumer satisfaction 1 Customer services 1 Customer servicse 1 Data processing 1 Design and construction 1 Electronic data processing 1 Electronic data processing departments 1 Electronic filing systems 1