What is iCloud Keychain?
iCloud Keychain keeps your Safari website usernames and passwords, credit card information, and Wi-Fi network information up to date across all of your approved devices that are using iOS 7.0.3 or later or OS X Mavericks 10.9 or later.
iCloud Keychain can also keep the accounts you use in Mail, Contacts, Calendar, and Messages up to date across all of your Mac computers. And when you sign in to Facebook, Twitter, LinkedIn, and your other Internet accounts, iCloud automatically adds your usernames and passwords to all of your devices.
Can I set up iCloud Keychain so that my data isn't backed up in the cloud?
Yes. When you set up iCloud Keychain, you can skip the step to create an iCloud Security Code. Your keychain data is then stored locally on the device, and updates across only your approved devices.
If you don't create an iCloud Security Code, Apple can't help you recover your iCloud Keychain.
