Boost your AppleID’s security
Learn how to set up and use two-factor authentication
introduced with iOS 9 and El Capitan, two-factor authentication (2FA) is a security feature in iCloud. It’s an evolution of two-step verification, which we’ll refer to as 2SV.
The latter pushes a security code to a device using either SMS or Apple’s Find My iPhone system; 2FA pushes a notification to “trusted devices” linked to your account. This tells you that someone has requested a verification code and shows you a map of the location where the request was made.
You can subsequently reject the attempt to access your account, or allow it and have the code sent to the trusted device which you’re using.
In addition to at least one trusted device, you’ll also have to register at least one trusted phone number. Apple encourages you to register more than one, such as your home phone — rather than the iPhone that you’ve connected to your iCloud account.
As well as having Apple send you a code, you can manually generate one yourself from one of your trusted devices.
two-factor authentication is an evolution of two-step verification