What is IT security?
IT security, which is short for information technology security, is the practice of protecting an organization’s IT assets—computer systems, networks, digital devices, [data](https://www.ibm.com/think/topics/data)—from unauthorized access, [data breaches](https://www.ibm.com/think/topics/data-breach), [cyberattacks](https://www.ibm.com/think/topics/cyber-attack) and other malicious activity.
IT security, which is short for information technology security, is the practice of protecting an organization’s IT assets—computer systems, networks, digital devices, [data](https://www.ibm.com/think/topics/data)—from unauthorized access, [data breaches](https://www.ibm.com/think/topics/data-breach), [cyberattacks](https://www.ibm.com/think/topics/cyber-attack) and other malicious activity.