Why is my car showing this symbol 🔐

This is my first time seeing this symbol in my subaru car. I did some research on google and it said it mean the anti-theft system is in operation? But that symbol is a car with a key not a lock. And it only showes after l lock my car and its turned off. I want to know if l should worry and take it to get it fixed. Thanks!

This is my first time seeing this symbol in my subaru car. I did some research on google and it said it mean the anti-theft system is in operation? But that symbol is a car with a key not a lock. And it only showes after l lock my car and its turned off. I want to know if l should worry and take it to get it fixed. Thanks!