also: セキュリティー
Broadly used for safety, protection, and measures against threats, similar to English 'security'. Common in IT, physical security, and general safety contexts.
This building has tight security.
I updated the security software on my computer.
The company strengthened its security in preparation for cyberattacks.
This website is said to have weak security.
The hacker breached the system's security.
You need to take security measures to protect personal information.
They tightened security at the airport.
security settings