Use Face ID or Touch ID

The NSA also recommends that you use biometric authentication to protect your data. This means your iPhone’s Face ID or Touch ID. 

Both methods are extremely solid and more convenient than relying on your passcode. Plus, using Face ID or Touch ID comes with a few extra benefits. 

Even if the person unlocks your iPhone with your passcode, they still won’t be able to access certain sensitive data, such as your hidden album in the Photos app, your locked apps in iOS 18, or make in-app purchases.

If you haven’t already, you can turn on Face ID or Touch ID by going to Settings > Face ID & Passcode and setting up Face ID.