Yubico - YubiKey 5Ci - Multi-Factor authentication (MFA) Security Key and passkey for iPhone/Android/PC, Dual connectors for Lighting/USB-C, FIDO Certified
Condition: New
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FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
In Stock.
Arrives
Saturday, Jul 4
Size: 5Ci
Features
- POWERFUL SECURITY KEY: The YubiKey 5 is a versatile physical passkey that protects your digital life from phishing attacks. It ensures only you can access your accounts.
- WORKS WITH 1000+ ACCOUNTS: Compatible with popular accounts like Google, Microsoft, and Apple. A single YubiKey 5 secures 100+ of your favorite accounts, including email, password managers, and more.
- FAST & CONVENIENT LOGIN: Plug in your YubiKey 5 via USB and tap it to authenticate. No batteries, no internet connection, and no extra fees required.
- MOST SECURE PASSKEY: Supports FIDO2/WebAuthn, FIDO U2F, Yubico OTP, OATH-TOTP/HOTP, Smart card (PIV), and OpenPGP. That means its versatile, working almost anywhere you need it.
- BUILT TO LAST: Made from tough, waterproof, and crush-resistant materials. Manufactured in Sweden and programmed in the USA with the highest security standards.
- PRIMARY & SPARE KEYS: Just like having a spare house key, we recommend buying two YubiKeysone for daily use and one as a spare. That way youll never get locked out of your accounts.
- YUBICO AUTHENTICATOR APP: Compatible with the safest authenticator app experience across mobile and desktop.
Brand: Yubico
Hardware Interface: USB
Special Feature: Dual connectors for Lighting and USB-C ports
Connectivity Technology: USB
Color: Black
Model Name: Y-291
Flash Memory Type: USB
Manufacturer: Yubico
Hardware Connectivity Technology: Lightning, USB Type C
Global Trade Identification Number: 69
Item model number: Y-291
Operating System: Android, IOS, Mac OS, Windows
Item Weight: 0.106 ounces
Product Dimensions: 1.59 x 0.47 x 0.2 inches
Item Dimensions LxWxH: 1.59 x 0.47 x 0.2 inches
Power Source: [Not Specified]
Is Discontinued By Manufacturer: No
Date First Available: August 20, 2019
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Jul 4
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
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Top Amazon Reviews
Size: 5Ci
I am very pleased with the Yubico YubiKey 5Ci. Shipping was prompt, and the security key arrived well-packaged and protected, with no signs of damage. The dual-connector design—featuring both USB-C and Lightning plugs—was exactly as advertised and ready for immediate setup. In terms of product quality, this YubiKey feels solid and reliable. The build quality gives confidence that it will withstand daily carry on a keychain, and the connectors seat securely into devices without wiggle or looseness. Setting it up with my accounts was straightforward; the configuration steps were clear and compatible with the MFA options in most services I use. Functionally, the key enhances security through hardware-based authentication rather than relying solely on passwords or SMS codes. It supports modern authentication standards such as FIDO2/WebAuthn and U2F, providing a practical second factor for logging into email, cloud services, password managers, and other online accounts that support security keys. The dual Lightning and USB-C connectors make it especially useful for iPhone users and other Apple devices that lack conventional USB ports. Yubico +1 From a value perspective, this security key offers strong protection at a reasonable cost compared with subscription-based alternatives or more complex enterprise solutions. Its broad platform compatibility—covering iOS, macOS, Windows, Linux, and many web services—adds versatility. While not every app supports hardware keys yet, the ecosystem continues to expand, and the YubiKey remains a robust, future-oriented investment in account security. Overall, this is a well-made, dependable MFA solution that combines convenience with significant security benefits, and I would confidently recommend it.
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Reviewed in the United States on January 3, 2026 by L Bess
Size: Nano USB-C
The YubiKey 5 Nano C is an outstanding device—compact, reliable, and essential for security. It works perfectly and is barely noticeable when plugged into the port. I also want to highlight my experience with the seller and Amazon support. There was a critical delivery issue caused by the local carrier (Ninja Van), who failed to deliver to my address. Amazon was very professional, acknowledged the carrier's policy violation, and sent a replacement immediately. Surprisingly, both the original and the replacement arrived later. I contacted support to return the extra unit because I didn't want the seller to suffer any loss for the carrier's mistake. However, Amazon allowed me to keep it as a gesture of goodwill. Highly recommend both the product and this seller for their integrity and great customer service. Five stars!
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Reviewed in the United States on February 28, 2026 by Vlad_N Vlad_N
Size: 5C
I’ve been using the YubiKey 5C for the past three months across my MacBook, Windows PC, Android phone, and even my newer iPhone (via USB‑C). Here’s why it deserves a top‑tier rating: Design & Build The key feels solid—machined aluminum with a matte finish that resists fingerprints. Its compact, key‑shaped profile slides onto a regular keyring, so I never forget it. No moving parts mean it’s practically indestructible. Setup & Compatibility Out‑of‑the‑box, the YubiKey announces itself as a security key. A quick “insert → tap” sequence registers it with any FIDO U2F/FIDO2‑compatible service (Google, GitHub, Microsoft, Dropbox, etc.). It works flawlessly on macOS, Windows, Linux, Android, and iOS (USB‑C iPhone). No extra drivers or software are required. Security Because the private keys are generated and stored inside the device, they never leave the YubiKey—even if the host machine is compromised. This hardware isolation blocks phishing, man‑in‑the‑middle attacks, and credential stuffing. The built‑in passkey support also enables true password‑less logins with a single tap. Everyday Use Logging in is a breeze: plug the key into the USB‑C port, tap the metal contact, and you’re authenticated. I’ve used it for everything from my primary Gmail account to SSH access on remote servers. The only hiccup was occasionally forgetting the key during a quick coffee run—solved by keeping a backup YubiKey on a separate keyring. The YubiKey 5C delivers enterprise‑grade security with consumer‑friendly simplicity. It eliminates passwords, thwarts phishing, and integrates seamlessly into any modern workflow. At its price point (~$45‑$55), it’s an investment that pays for itself the moment it prevents a single account breach. I highly recommend it to anyone serious about protecting their digital life.
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Reviewed in the United States on November 4, 2025 by UnServ