Computer security

Computer security is a branch of information technology known as information security which is intended to protect computers. Computer security has three main goals:
Computer security involves telling computers what they are "not to do". This makes computer security unique because most programming makes computers "do" things. Security takes much of a computer's power.
Basic computer security methods (in approximate order of strength) can be:
A cybersecurity specialist identifies threats to information security and risks of data loss, develops and implements measures to counter threats and solutions to protect against information loss; ensures the safety and confidentiality of data; participates in the development and implementation of IT solutions.
An example of complexity and pervasiveness of the issue is vending machines, per "Hackers Lurking in Vents and Soda Machines" April 7, 2014 New York Times.