You may not think much about encryption day to day, but it’s the reason the FBI can't easily get at the data on the iPhones that come into its possession; it also means if someone steals your phone, they won't be able to get anything off it without the PIN code.
In terms of individual apps, it stops anyone snooping on your WhatsApp and Signal conversations when they’re in transit from one device to the other—and that includes anyone who works at WhatsApp or the Signal Foundation. In short, it makes it much, much harder for anyone to get at your photos, messages, documents, and everything else you've got stored on your phone. Here’s how to make sure it’s working for you.
iPhone Encryption
It was the 2014 release of iOS 8 that encrypted every iPhone back to the 4S by default. Much to the chagrin of various law enforcement agencies, that encryption has only gotten tougher over time.
Everything on an iPhone is locked down as soon as you set a PIN code, a Touch ID fingerprint, or a Face ID face—your PIN, fingerprint, or face acts as the key to unlock the encryption, which is why you're able to read your messages and view your files as soon as your phone is unlocked.
This is also why you should never leave your phone lying around unlocked if you value the data on it. You can configure the screen lock on your iPhone by going to Face ID & Passcode—or Touch ID & Passcode—on the iOS Settings menu. If you go the PI ..
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