 Computer security, computer security, cyber security, or ID security is the protection of computer systems from theft award damage to their hardware, software or electronic data, as well as from disruption or misdirection of the services they provide. The field is of growing importance due to increasing reliance on computer systems, the Internet and wireless networks such as Bluetooth and WIFI, and due to the growth of smart devices, including smartphones, televisions and the various tiny devices that constitute the Internet of Things. Due to its complexity, both in terms of politics and technology, it is also one of the major challenges of contemporary world.