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    Yubico YubiKey 5Ci – Multi-Factor Authentication (MFA) Security Key & Passkey, Dual Lightning & USB-C Connectors, FIDO2/U2F Certified – Works with iPhone, Android & PC

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    • YubiKey 5 Nano
    • YubiKey 5 NFC
    • YubiKey 5C
    • YubiKey 5C Nano
    • YubiKey 5C NFC
    • YubiKey 5Ci
    • SIMPLE - Most effective way to protect against account takeovers
    • EASY - Intuitive user experience and fast setup, deployment, and use
    • SCALABLE- Integrates with systems tailored for all business types and sizes
    • EFFICIENT- Reduce helpdesk tickets for password reset or account lockout
    • MULTI-PROTOCOL - Bridge between authentication methods and systems
    • WORKS - YubiKey 5 Series Works with the most web services
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    Overview
    Specs
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    YubiKey 5 Series

    Multi-protocol security key, eliminate account takeovers with strong two-factor, multi-factor and passwordless authentication, and seamless touch-to-sign. Multi-protocol support allows for strong security for legacy and modern environments. And a full range of form factors allows users to secure online accounts on all of the devices that they love, across desktops and mobile.

    • Multi-protocol support; FIDO2, U2F, Smart card, OTP, OpenPGP 3
    • USB-A, USB-C, NFC, Lightning
    • IP68 rated: dust tight and water submersible
    Strong 2 Factor
    Strong two-factor

    Hardware authenticator as a second factor, in addition to a password, in a strong two factor authentication solution.

    Strong MultiFactor
    Strong multi-factor

    Combination of a hardware authenticator with a PIN to secure high assurance requirements such as financial transactions or submitting a prescription.

    Passwordless
    Passwordless

    Hardware authenticator delivering strong single factor authentication, replacing weak passwords, as part of a rapid but secure tap-n-go experience.

    Works with hundreds of services
    Works with hundreds of services

    The YubiKey works with Windows and Mac login, Gmail, Dropbox, Facebook, Salesforce, Duo, and many more services.

     

    • SECURITY KEY: Protect your online accounts against unauthorized access by using 2 factor authentication with the Yubico YubiKey security key.
    • FIDO: The YubiKey is FIDO certified and works with Google Chrome and any FIDO-compliant application on Windows, Mac OS or Linux. Secure your login and protect your Gmail, Facebook, Dropbox, Outlook, LastPass, Dashlane, 1Password, accounts and more.
    • COMMUNICATIONS: Available with USB-A, USB-C, Lightning, NFC. Insert the YubiKey into a USB port and tap to gain access.
    • NFC-ENABLED: Touch-based authentication for NFC supported devices.
    • DURABLE AND SECURE: Extremely secure and durable, YubiKeys are tamper resistant, water resistant, and crush resistant.
    • MULTI-PROTOCOL SUPPORT: FIDO2, FIDO U2F, Yubico OTP, OATH-TOTP, OATH-HOTP, Smart card (PIV), OpenPGP, and Challenge-Response capability to give you strong hardware-based authentication.

    The YubiKey 5 Series is a hardware based authentication solution that provides superior defense against phishing, eliminates account takeovers, and enables compliance requirements for strong authentication.

    The USB-C connection of the YubiKey 5Ci works with a wide range of services including: Google, Microsoft Accounts, Dropbox, Facebook, Twitter, GitHub, Dashlane, Keeper Security, and more.

    Support for the Lightning connection of the YubiKey 5Ci is currently emerging with a growing number of iOS apps, including 1Password, Bitwarden, Dashlane, Keeper Security, LastPass, and Okta, as well as a number of services through the Brave browser.

    Strong Authentication
    The YubiKey offers superior security by combining hardware-based authentication and public key cryptography to effectively defend against phishing attacks and eliminate account takeovers. It offers multi-protocol support including FIDO2, Yubico OTP, OATH HOTP, U2F, PIV, and Open PGP. Users have the broadest options for strong authentication including not only two-factor authentication, but also support for single factor passwordless login and multi-factor authentication in conjunction with user touch and PIN

    .

    Passwordless Enabled
    The Yubikey 5 Series helps organizations accelerate to a passwordless future by providing support for the FIDO2 protocol. FIDO2 supports not only todays two-factor authentication but also paves the way for eliminating weak password authentication, with strong single factor hardware-based authentication.

    Easy,
    Fast and Reliable
    The YubiKey provides a simple and intuitive authentication experience that users find easy to use, ensuring rapid adoption and organizational security. With authentication speeds up to 4X faster than OTP or SMS based authentication, the YubiKey does not require a battery or network connectivity, making authentication always accessible.

    Reduce IT Operational Costs
    The ease of use and reliability of the YubiKey is proven to reduce password support incidents by 92%. This was documented in a research paper by Google, describing the Google employee rollout to more than 70 countries. Deployments are faster and cost less with the YubiKeys industry leading support for numerous protocols, systems and services.

    Modern Authentication from the Industry Leader
    The YubiKey is the trusted secure authentication choice for the largest technology, finance, and retail companies in the world. This includes 9 of the top 10 technology companies, 4 of the top 10 US banks, and 2 of the top 3 global retailers. Companies including Google, Facebook, Salesforce and thousands more trust the YubiKey to protect account access to computers, networks and online services.







    Warranty & Returns

    Warranty, Returns, And Additional Information

    Warranty

    • Limited Warranty period (parts): 1 year
    • Limited Warranty period (labor): 1 year
    • Read full details

    Return Policies

      We want to ensure your holiday shopping this year is hassle-free. That’s why we’re automatically extending our return policies on almost every product! For purchases placed between November 1st, 2025 and December 31, 2025 you will have until January 31, 2026 to return your product.

    • Return for refund until: January 31, 2026
    • Return for replacement until: January 31, 2026
    • This item is covered by Newegg.com's Extended Holiday Return Policy.
    • 15% restocking fee may apply.
    • Read full return policy for details.

    Manufacturer Contact Info

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    The Yubico YubiKey 5Ci is a multi-factor authentication security key with Lightning and USB-C connectors, suited to people who want a portable way to secure supported accounts across compatible phones, tablets, and computers.

    Recommended For

    • iPhone or iPad users with a Lightning port who want to authenticate by plugging in a key rather than tapping NFC, especially when their sign-in service supports security keys.
    • People who switch between Lightning-equipped Apple devices and USB-C computers or phones and want one physical key for both connector types.
    • Travelers and mobile workers who regularly sign in on supported phones or computers and prefer a directly connected security key over carrying a separate authenticator device.
    • Security-conscious users who need more than FIDO sign-in, such as people whose supported workflows also use the YubiKey 5 Series’ other authentication protocols.

    Real-World Use Scenarios

    • When signing in to a supported account in Safari on a compatible iPhone or iPad, the user plugs in the YubiKey 5Ci and follows the security-key prompt; the key provides a physical second step after it has been registered with the account.
    • When a user signs in to a supported service on an iPhone with Lightning and a computer with USB-C, the same key can connect directly to either device, avoiding the need to carry separate keys for those ports.
    • When opening 1Password on a supported iPhone setup with the key registered, the user can insert the 5Ci and tap it when prompted to complete authentication; a Macworld reviewer reported this flow working in testing.
    • When a service uses OATH one-time codes and supports the YubiKey Authenticator app, the user can connect the 5Ci to a compatible device and retrieve a code stored on the key for sign-in.
    • In an organization configured for PIV smart-card authentication, an employee can use the 5Ci with a compatible computer or supported iOS setup to authenticate with an assigned certificate; this requires IT provisioning and compatible sign-in systems.

    Spec Summary

    AttributeValue
    Best ForMulti-factor authentication and account sign-in across Android, ChromeOS, iOS, Linux, macOS, and Windows devices with Lightning or USB-C connectivity
    Authentication And ProtocolsSupports FIDO2, WebAuthn, OATH-TOTP, Smart Card, and PIV authentication
    ConnectivityLightning and USB Type-C connectors
    CompatibilityCompatible with Android, ChromeOS, iOS, Linux, Mac, and Windows
    Control MethodTouch and application control
    Durability And MaterialsIP68-rated with a plastic enclosure
    Physical SpecificationsBlack; 0.2 × 1.6 × 0.5 inches; weighs 0.01 pounds
    PowerDoes not require batteries; batteries are not included
    Model IdentifiersYubico YubiKey 5 Series; model YubiKey 5Ci; part/model number 100930