YubiKey 5Ci FIPS (Firmware 5.4)

The YubiKey 5Ci FIPS (USB-C + Lightning) is the only dual-connector hardware security key on the market, combining USB-C and Lightning in a single device for seamless protection across iPhone, iPad, Mac, and PC.

It is FIPS 140-2 validated (Overall Level 2, Physical Security Level 3) and meets Authenticator Assurance Level 3 (AAL3) under NIST SP800-63B, ensuring it complies with strict federal and regulatory standards.

This edition of the YubiKey combines multi-protocol support including FIDO2, U2F, PIV, OATH, OTP, and OpenPGP, to protect accounts across cloud, hybrid, and on-premises systems. Designed for government, finance, and enterprise environments, it eliminates account takeovers and simplifies compliance-driven authentication.

Recommended for: Mobile-first regulated workforces operating across iPhone, iPad, Mac, and modern PCs without the need to carry multiple keys or adapters.

Firmware note: This product ships with firmware 5.4.3 (FIPS 140-2 validated). FIPS 140-2 devices with active certificates remain compliant. The next-generation key with firmware 5.7 and FIPS 140-3 validation (NIST CMVP Certificate #5291) is now available - view the YubiKey 5Ci FIPS (Firmware 5.7).

Note: The YubiKey for Windows Hello app is not compatible with the FIPS series.

Dual Connector (USB-C + Lightning): The only hardware security key with both connectors, eliminating the need for adapters across iPhone, iPad, Mac, and PC

FIPS 140-2 Validated Security: Certified at Overall Level 2 / Physical Level 3, meeting US government-grade standards

Phishing and Account Takeover Defence: Hardware-based cryptography stops remote credential theft

Multi-Protocol Compatibility: Works with FIDO2, U2F, PIV, OTP, OATH (HOTP/TOTP), and OpenPGP for flexibility across platforms

Passwordless Authentication: Enables FIDO2/WebAuthn login for modern, phishing-resistant authentication

Fast, Reliable Access: Authenticates 4× faster than OTP or SMS codes with no batteries or network required

Enterprise Integration: Supports Microsoft Entra ID, Google Cloud, Okta, Ping Identity, AWS IAM, and Cisco Duo

Rugged Design: IP68 rated, crush resistant, and built to last for years of enterprise use

Trusted Globally: Adopted by top tech firms, banks, and government agencies worldwide

Model: YubiKey 5Ci FIPS (USB-C + Lightning, No NFC)

Firmware: 5.4.3

Certifications: FIPS 140-2 (Level 2, Physical Level 3) | FIDO2 | U2F | AAL3 (NIST SP800-63B)

Authentication Methods: Strong Two-Factor | Multi-Factor | Passwordless

Protocols: FIDO2/WebAuthn | U2F | PIV (Smart Card) | Yubico OTP | OATH (HOTP/TOTP) | OpenPGP | Static Password

Cryptography: RSA 2048 | ECC p256 | ECC p384

Connectivity: USB-C + Lightning (No NFC)

Durability: IP68 rated | Crush Resistant | No Batteries | No Moving Parts

Device Type: FIDO HID Device | CCID Smart Card | HID Keyboard

UPC/GTIN: 5060408464243

Made in: USA and Sweden (EU)

The YubiKey 5Ci FIPS integrates seamlessly with identity and access management platforms supporting FIDO2, U2F, and PIV, including:

• Microsoft Entra ID, Active Directory, Google Cloud Identity, AWS IAM
• Okta, Ping Identity, Cisco Duo, Salesforce
• 1Password, Keeper, Bitwarden, LastPass Premium
• Apple iOS, macOS, Windows, Linux, and other modern desktop and mobile platforms

The YubiKey 5 FIPS Series delivers compliance-grade authentication for organisations operating in regulated industries, offering unmatched security, interoperability, and long-term reliability for enterprise and government use.