Cyber hygiene is a security measure to keep the organization's IT environment in a healthy state by grasping the IT assets and vulnerabilities of the organization in real time and promptly eliminating vulnerabilities. Specifically, it includes prompt application of basic security patches, introduction of cyber-attack countermeasure software, strengthening of passwords, and use of security software to prevent unauthorized access. Practicing cyber hygiene improves defense against cyberattacks and reduces security incidents.