Security Key Yubico YubiKey 5Ci FIPS USB-C Lightning

The Security Key Yubico YubiKey 5Ci FIPS USB-C Lightning is a validated hardware authentication key designed to protect online accounts and meet strict compliance requirements. Compatible with devices using USB-C and Lightning connectors, this YubiKey supports major operating systems including Windows, macOS, Chrome OS, Linux, Android and iOS. Constructed from glass-fiber reinforced plastic and certified to FIPS 140-2 Overall Level 2 with Physical Security Level 3, it delivers robust, long-lasting protection without batteries or moving parts.

Advantages

The YubiKey 5Ci FIPS offers broad ecosystem compatibility with identity providers and platforms such as Centrify, Ping, Okta, Google and many others, enabling quick deployment. It is configurable to use multiple authentication protocols across computers, networks and online services. The device is IP68 rated for water and dust resistance, crush resistant, and requires no battery or network connection; users authenticate by inserting and tapping the key. It supports a wide range of protocols including WebAuthn, FIDO2 (CTAP1/CTAP2/CTAP2.1), U2F, PIV-compatible smart card, Yubico OTP, OATH (HOTP and TOTP), OpenPGP and secure static passwords.

Suitable for

• Organizations requiring FIPS-validated authentication for compliance
• Enterprises and IT teams deploying hardware MFA across user fleets
• Individuals needing a durable multi-protocol security key for personal and work accounts
• Use with cloud services and identity providers such as Google, Microsoft, Okta, AWS IAM, Duo and Salesforce

Key specifications

• Model: YubiKey 5Ci FIPS (USB-C and Lightning connectors)
• Certifications: FIPS 140-2 validated — Overall Level 2, Physical Security Level 3
• Materials: Glass-fiber reinforced plastic
• Environmental resistance: IP68 (water and dust resistant), crush resistant
• Protocols supported: WebAuthn, FIDO2 CTAP1/CTAP2/CTAP2.1, U2F, PIV-compatible smart card, Yubico OTP, OATH HOTP/TOTP, OpenPGP, Secure Static Passwords
• Compatibility: Windows, macOS, Chrome OS, Linux, Android, iOS

How to use

Insert the YubiKey 5Ci FIPS into a device using the USB-C or Lightning connector as appropriate for your device, then tap the contact when prompted to complete authentication. For NFC-enabled mobile devices, use tap-and-go on supported Android and iOS models via the Yubico Authenticator app where applicable. Configure required protocols and link the key to accounts or identity provider settings following provider-specific setup instructions.

Usage recommendations

Register the YubiKey with multiple critical accounts and keep a backup key stored securely. Ensure your identity provider or application supports the selected authentication protocol before relying on the key for primary access. Regularly verify firmware and compatibility notes from Yubico and your service providers.