Read/write is possible over NFC due to Apple's recent expansion, and via Lightning due to the YubiKey 5Ci's MFi certification, but not using other connection methods, namely USB-C, which has replaced the Lightning connector on third-generation and later iPad Pros. Since the one-time passwords generated by Yubico Authenticator are time-based, and the YubiKey does not have the ability to track time (due to its lack of a battery), proper functionality requires iOS/iPadOS being able to both write to and read from the YubiKey (it sends the YubiKey the current time and receives the one-time password). ***iOS/iPadOS is only able to communicate with the YubiKey's OATH application (required for Yubico Authenticator functionality) via NFC and Lightning. ** iOS/iPadOS 13.3 and Safari are required to leverage native support for WebAuthn. In any case, we would advise you to try an adapter from a reliable, trust-worthy brand. *Please note that we do not recommend using adapters, but do understand that adapters are sometimes unavoidable. Note: Yubico Authenticator does not support this option** if you're not running iPadOS 16.1 and the latest version of the Yubico Authenticator***

Any YubiKey model can be plugged either directly into an iOS/iPadOS device or using an adapter* to take advantage of both the OTP functionality, as well as WebAuthn*.

The YubiKey 5 NFC, YubiKey NEO, and Security Key NFC can be used over NFC on NFC-enabled iPhones.**.

The YubiKey 5Ci can connect directly to an iOS/iPadOS device via a Lightning connector.

Yubico does not maintain setup documentation for third party products or services.ĭepending on the iOS/iPadOS hardware as well as the YubiKey or Security Key model, there are three methods for using a YubiKey with iOS/iPadOS. For information such as can I log into my service on iOS/iPadOS, consult the Works with YubiKey Catalog or reach out to the service directly for more information. Note: This article covers basic YubiKey / Security Key use on iOS and iPadOS.

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