The idea behind iCloud is to create a hub that connects and syncs everything across multiple devices under one Apple ID. Other than to help users work from multiple devices, this scenario also allows users to make their passwords and others important things available everywhere. The one that keeps your private data is iCloud Keychain.
The service stores our Wi-Fi network and passwords, credit card information and Internet accounts. With iCloud Keychain enabled on multiple iOS and Mac devices, we can sync this information across all these devices.
But as far as privacy concerns, there has to be a way to keep users’ data from prying eyes. That’s why you need to approve iCloud Keychain before you could use it on additional devices.
How do you approve iCloud Keychain from another device?
To set up iCloud Keychain on iPhone, you just need to go to Settings > [your name] > iCloud, tap Keychain and toggle iCloud Keychain on, and then follow the onscreen instructions.
Although setting up iCloud Keychain on the first device are simple, adding more device to use iCloud Keychain service is not as simple. Apple offers us two way to verify a new device when set up iCloud Keychain:
When you set up iCloud Keychain on a new device, a notification will automatically be displayed on your Mac or other iOS devices that have already enabled iCloud Keychain. If you use iCloud Keychain on your Mac, you’ll find an Apple ID sign in alert at the upper-right corner of your screen.
To approve your iPhone from Mac, click Continue, enter your Apple ID password and then click Allow.
When you set up iCloud Key the first time, you’ll be asked to create a 6-digit iCloud Security Code. You can use the code to set up iCloud Keychain on a new device.
If you forgot your iCloud Code, you can create a new iCloud Security Code from another device that uses your iCloud Keychain. Here’s how to create new iCloud Security Code:
On iPhone, iPad, or iPod touch:
On Mac computer
In the case that you cannot find the “Approve with Security Code” option on iPhone, you can go to another device that uses iCloud Keychain. In Keychain Options panel (on Mac) or Advanced Keychain screen (on iOS), you'll see an option to allow approving with security code.
Dealing with sensitive information between devices means that you could lose your passwords and other important data if something goes south. That’s why you should always remember to backup your data.
You can protect your iPhone data to the local storage with the help of iCareFone which will back up iPhone/iPad/iPod touch data to computer as a second layer of protection. Actually iCareFone is an all-in-one iOS systemcare software that supports to cleanup iOS, backup&restore iOS data, manage iOS data, and fix any iOS system issues.