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Users with an iCloud account will be required to have two-factor authentication when upgrading to iOS 11 and macOS High Sierra. Apple claims that its most advanced account security is required to use some of the latest features in operating systems, so the user will no longer be able to choose, whether he wants two-step or two-factor authentication if he switches to the latest versions.

Apple this week began notifying users who use two-factor authentication that they will be migrated to two-factor authentication after the upgrade. Although both security systems are similar, two-factor authentication is even more secure.

Two-factor security, which has worked on Apple products since 2015, requires a six-digit code to be entered when logging into an iCloud account on a new device. This six-digit code is sent to another trusted device paired with yours Apple ID, while the device must be running at least iOS 9, iOS X EI Capitan, watchOS 2 or tvOS and later.

Whereas two-step verification only sends a four-digit code to any device that accepts SMS. What's great about two-factor authentication is that it allows you to see the location of a new device that's trying to access your iCloud account.

"If you install the public beta of iOS 11 or macOS High Sierra this summer and meet the basic requirements, your Apple The ID is automatically updated to use two-factor authentication,” explains Apple in the email to the user. “This is our most advanced and easy-to-use account security and is required to use some of the new features in iOS, macOS and iCloud. After upgrading, you'll get the same level of security you enjoy with two-step verification, but you'll also get an even better user experience. Verification codes will automatically appear on your trusted devices every time you sign in.”

For now, it is not entirely clear whether two-factor authentication will be required for all users who upgrade to iOS 11 or macOS High Sierra, or if it will only be mandatory for users who already use two-factor authentication.

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