Security measures 101 Mobile communication systems 69 Mobile computing 46 Cell phone systems 35 Mobile communication system 32 Wireless communication systems 32 Computer crimes 13 Prevention 13 Global system for mobile communications 9 Computer security 8 Anti-theft devices 6 Automobiles 6 Computer networks 6 Instruction detection systems (Computer security) 4 Microcontrollers 4 Smartphones 4 Wireless LANs 4 Confidential business information 2 Intrusion detection systems (Computer security) 2 Malware (Computer software) 2 Online social networks 2 Operating systems (Computers) 2 Protection 2 Security systems 2 Ad hoc networks (Computer networks) 1 Data protection 1 Handbooks, manual, etc 1 Handbooks, manuals, etc 1 Ubiquitous computing 1