Keychain

Set up iCloud Keychain

With iCloud Keychain, you can keep your passwords and other secure information updated across your devices.

iCloud Keychain remembers things, so that you don't have to. It auto-fills your information—like your Safari usernames and passwords, credit cards, Wi-Fi networks, and social log-ins—on any device that you approve.

Get started

To use iCloud Keychain, you need iOS 7.0.3 or later on your iPhone, iPad, or iPod touch, and OS X Mavericks 10.9 or later on your Mac. Learn about availability by country or region.

When you update your iPhone, iPad, or iPod touch to the latest iOS, the setup assistant asks you to set up iCloud Keychain. Instructions vary based on whether you're using two-factor authentication or another type of security, like your email, password, or security questions.

If you're using two-factor authentication

With two-factor authentication, your device is trusted when you sign in with your Apple ID, so in most cases you don't need to re-approve it. 

On your iPhone, iPad, or iPod touch:

1. Tap Settings > [your name] > iCloud. For 10.2 or earlier, tap Settings > iCloud. 
2. Tap Keychain. 
3. Slide to turn on iCloud Keychain.

Set up iCloud Keychain - Apple Support

https://support.apple.com/en-in/HT204085

Watch this GIF below to get verification code