The YubiKey 5Ci has a USB-C connector and a Lightning connector so that it can be plugged into iPhones, iPads, Macs, and other devices that use these connectors, while the YubiKey 5C NFC has a USB-C connector and the ability to interface with NFC-enabled devices. Yubico sent me a pair of its security keys so that I could try them out with Apple’s Security Key function. You can use any FIDO Certified security key to activate the feature, and Apple recommends the YubiKey 5C NFC and the YubiKey 5Ci, two devices sold by Yubico.

Instead of using a code generated by a secondary Apple device for authentication, when you log into your ‌Apple ID‌ on another device after setting up Security Keys, you need to authenticate through a physical key that’s actually plugged in to your device. With the launch of iOS 16.3 and macOS 13.2 Ventura, Apple added Security Keys for the Apple ID, offering a more robust way to protect your Apple account and everything associated with your Apple account.Ī Security Key is a physical device that works with two-factor authentication.

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