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Yubico

Yubico - YubiKey 5Ci - Two-Factor authentication Security Key for Android/PC/iPhone, Dual connectors for Lighting/USB-C - FIDO Certified

    • Based on 2,055 reviews
Condition: New
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$98.87 Why this price?

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As low as $16.48 / mo
  • – 6-month term
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This item is eligible for return within 30 days of receipt

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.

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Availability: In Stock.
Fulfilled by AztekComputers
Arrives May 2 – May 3
Order within 1 hour and 19 minutes
Available payment plans shown during checkout

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Features

  • Dual connector: Yubico YubiKey 5Ci is an innovative multi-protocol hardware authenticator featuring a dual connector for lightning and USB-C ports. With the Lightning connector, you can protect your iOS mobile apps and connect with a simple touch.
  • Compatibility: Yubico 5Ci provides the YubiKey 5Ci, on the one hand, with the functionality to support thousands of apps and protect their account credentials. The Lightning connector, on the other hand, is innovation-oriented and is currently compatible with a limited number of applications.
  • FIDO: YubiKey 5Ci is FIDO-certified and supports Google Chrome and any other FIDO compatible application on Windows, Mac OS or Linux. Protect your login credentials and protect your Gmail, Facebook, Dropbox, Outlook, LastPass, Dashlane accounts and many more.
  • Multi-protocol support: This YubiKey offers multi-protocol support including FIDO (U2F, FIDO2), Yubico OTP, OATH-TOTP, OATH-HOTP, Smart Card (PIV), OpenPGP and challenge response capability to ensure strong hardware-based authentication.

Brand: ‎Yubico


Series: ‎Y-291


Item model number: ‎Y-291


Operating System: ‎Windows, Mac OS, IOS, Android


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


Color: ‎Black


Power Source: ‎[Not Specified]


Manufacturer: ‎Yubico


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: May 2 – May 3

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Keeps your stuff secure.
Size: YubiKey 5Ci
Did exactly what I needed it to do, and I love the extra layer of security.
Reviewed in the United States on March 12, 2025 by Avid Shopper
    • Worked perfectly
Size: YubiKey 5Ci
I’ve had my computer and phone hacked. This easily prevents this and is seamless to do! I highly recommend!
Reviewed in the United States on March 14, 2025 by FallToArms
    • BEWARE: to get the most up-to-date version you HAVE to buy from Yubico site
Size: YubiKey 5Ci
Review Image by DRenteria DRenteria
Review Image by DRenteria DRenteria
Review Image by DRenteria DRenteria
The product itself is A++++, 6/5 stars, highly recommend. BUT: because this is tamper-resistant hardware, you cannot upgrade/update the firmware. The version you get is the version you will always have. The latest version 5.7+ is the firmware update that takes your Fido2 credential capacity from 25 accounts to 100 accounts. This is for 5.7+ only, meaning if you buy from Amazon like I did there is no guarantee you’re getting the latest version (like in my case). Therefore when you read specifications for yubikeys always remember that they are firmware version specific. They cost the same exact price as they do on Yubico, so why not buy there? If you buy here your getting 1/4 the capabilities of the device for the same price. Also I was sent one with only the lighting end functioning and c end broken. Got a new one but still with outdated firmware. Product is still great I just don’t see this disclaimer anywhere on this site so I will be the one to make it. The firmware is non-upgradeable, by design, and for good reasons. Therefore this product should not even be listed on Amazon, don’t make my mistake. Go to the manufacturer to purchase ... show more
Reviewed in the United States on May 28, 2024 by DRenteria DRenteria
    • You may not need a lightning plug for much longer - this one is very expensive for what it is
Size: YubiKey 5Ci
This one is a bit pricey but it necessary if one still has an older ipad without USB-C. It works well. Apple has finally made their ipad USB-C port compatible with yubikey, I haven't tested that. I have used this key with windows and Mac PC's, as well as with an iphone and it works easily and well. I also own a USB-C NFC and that also works easily, except with an old ipad. You need to have at least 2 keys in case one gets lost, and I recommend that the second key be a cheaper version as you don't need a complete drop-in replacement you just need the backup key to add a replacement key. You should know that using a security key to lock down an apple account means that you lose the ability to ask Apple to unlock your account should you lose your yubikey, which can be a big deal. Other accounts are not as strict and treat the yubikeys as just another second factor. This is a complicated product and I am enjoying getting to learn about using it. Yubico has great support materials on their website and good links to external sites for various accounts and services you might use their key with. Since this version is pricey (about $25 more than the USB-C/NFC one), I would recommend only getting one of these, and then a cheaper different yubikey as a backup. The backup device is only necessary if the first gets lost, and once you replace the lost key you only need the backup on one device to do the task of adding the replacement key to all your accounts. This is a bit cumbersome but hopefully it'll get easier with time. Last thing - this key has it's keyring hole in the center, which works surprisingly well; it sits on my keychain nicely even though I worried it wouldn't. TL;DR - great product but security keys can be "dangerous" and are not for everyone. This one is pricey because it supports an edge use case (old ipads). Edit to add—I also own a USC-C NFC version of yubikey, which is similar to this product but is cheaper. I wanted to add that the lightning/USB yubikey is my favorite form factor as it is much SMALLER and I also prefer the activation mechanism of pinching it instead of touching a metal front. ... show more
Reviewed in the United States on July 26, 2023 by Anonymous Reviewer 338
    • It’s okay
Size: YubiKey 5Ci
After having an account hacked and researching ways to make them more secure, I learned about security keys. I feel a lot better about my info along with my accounts for having another way to protect my stuff but I do think that this was on the more expensive side. I wish it was bigger as it can be lost easily. I also wish it came with directions as I am a first timer with security keys. All in all, I recommend buying one if you want more security ... show more
Reviewed in the United States on January 15, 2024 by Bethany
    • Perfect for security for my Gmail
Size: YubiKey 5Ci
I use this for my gmail and other accounts and it works very well.
Reviewed in the United States on December 14, 2024 by Chester
    • Dissatisfied
Size: YubiKey 5Ci
I was told this is like one of the best securities you can get for your passwords. This thing never work from day one I would not recommend it.
Reviewed in the United States on March 16, 2025 by Jose Rodriguez
    • A must have in your privacy toolkit - requires two to work with Apple phones and iPads
Size: YubiKey 5Ci
You can mute, turn off, not allow -etc etc , but that will not stop someone from listening to your every word! Really - it happens , it happened to me , and utilizing weak security protocols from my FORMER cell provider , my entire identity was stolen by someone access my phone illegally, one they captured my passcodes via my camera and my information thru 24 / 7 ease-dropping, by the time it was discovered it was too late , I would not dare allow anyone to use a phone in my home , or around me without this security key paired with a NFC card - it works and my hackers tried to disable it remotely with no success! I keep extra ones that I let people around me use to keep our passcodes private , at my house you can leave your phone in your car, or use the mic-Locke! Once soneobe gains access to your camera they can see your passcodes or your s keystroke counter to learn it, in real time I was able to screen record a hacker using my user id and passcode, but once I added the NDC card with a second security key , they could not use the passcode alone, they had to have the physical card and key or it would not allow access. A must have for todays AI -black hat hacker world !!! Nite that Apple phone will require 2 keys -at the same time as your must have a backup , a safety measure to ensure you do not lock your self out of your phone - I did not know that until I stated to use , I hope that messengers conveyed , I added a NFC card as my second key . ... show more
Reviewed in the United States on September 29, 2024 by Deuces two you

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