Multilevel security

Multilevel security means that there are different levels of protection for different types of information. Think of it like a pyramid with different levels. The bottom level might be for something that's not very important or secret, like your toys. The middle level might be for things that are a little more important, like your passwords or pictures you don't want to share with everyone. And the top level would be for things that are super important and need to be kept really safe, like the codes to launch a spaceship or the recipe for your mom's secret cookies.

Each level has its own set of rules about who can see and access that information. It's like a secret club where you need a special password to get in. Some people might be allowed in at the bottom level, but not be able to go up to the top level because they don't have the right security clearance.

Multilevel security helps to protect important information from getting into the wrong hands by making sure that only people who are supposed to see it can access it. It's like having a lock on your diary or a secret password on your computer, but much more complex and important because it's protecting things like national security or confidential business information.