Computer security, cybersecurity or information technology security (IT security) is the protection of computer systems and networks from information disclosure, theft of or damage to their hardware, software, or electronic data, as well as from the disruption or misdirection of the services they provide.
The field is becoming increasingly significant due to the increased reliance on computer systems, the Internet and wireless network standards such as Bluetooth and Wi-Fi, and due to the growth of "smart" devices, including smartphones, televisions, and the various devices that constitute the "Internet of things". Owing to its complexity, both in terms of politics and technology, cybersecurity is also one of the major challenges in the contemporary world.
In computers and computer networks, an attack is any attempt to
expose, alter, disable, destroy, steal or gain information through
unauthorized access to or make unauthorized use of an asset. A
cyberattack is any offensive maneuver that targets computer
information systems, infrastructures, computer networks, or
personal computer devices.
An attacker is a person or process that attempts to access data,
functions, or other restricted areas of the system without
authorization, potentially with malicious intent. Depending on the
context, cyberattacks can be part of cyberwarfare or
cyberterrorism.
Security is freedom from, or resilience against, potential harm
(or other unwanted coercive change) caused by others.
Beneficiaries (technically referents) of security may be of
persons and social groups, objects and institutions, ecosystems or
any other entity or phenomenon vulnerable to unwanted change.
Refugees fleeing war and insecurity in Iraq and Syria arrive at
Lesbos Island, supported by Spanish volunteers, 2015 Security
mostly refers to protection from hostile forces, but it has a wide
range of other senses
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