Protection Rings and Privileges
Learn about the x86 privilege levels (rings) and how they enforce separation and security between operating system and user applications.
Intro: Protection Rings
Ever wondered how your apps are kept separate from the operating system? Or how a malicious program can't just take over your computer?
The answer lies in privilege rings, a core security feature of x86 processors!
Why Rings? Security!
Privilege rings create a hierarchical structure for software execution. Think of them as security levels.
- Isolation: Prevent user programs from crashing the OS.
- Security: Protect critical system resources.
- Stability: Ensure the system runs reliably.