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	This Item Yubico - YubiKey 4 - USB-A, Two-Factor Authentication	Recommendations Identiv uTrust FIDO2 NFC Security Key USB-C (FIDO, FIDO2, U2F, PIV, TOTP, HOTP, WebAuth)	dummy Yubico - YubiKey 5 NFC - Two-Factor authentication (2FA) Security Key, Connect via USB-A or NFC, FIDO Certified - Protect Your Online Accounts	dummy Yubico - YubiKey 5 Nano - Two-factor authentication (2FA) security key, connect via USB-A, compact size, FIDO certified - Protect your online accounts	dummy Yubico - YubiKey 5C NFC - Two-Factor authentication (2FA) Security Key, Connect via USB-C or NFC, FIDO Certified - Protect Your Online Accounts
	See details	Try again! Details Added to Cart	Try again! Details Added to Cart	Try again! Details Added to Cart	Try again! Details Added to Cart
Price	Currently unavailable.	$15.75	$50.00	$60.00	$55.00
Delivery	—	—	—	Get it as soon as Tuesday, May 14	Get it as soon as Wednesday, May 15
Customer Ratings	4.3800	4.215	4.616,057	4.61,060	4.616,057
Value for money	5.0	4.2	4.1	4.0	4.1
Easy to use	3.9	4.2	4.2	4.4	4.2
Durability	4.4	—	4.6	4.3	4.6
Tech Support	—	—	4.0	4.0	4.0
Fingerprint reader	—	—	4.0	4.5	4.0
Sold By	—	Identify Systems	Yubico Inc.	Yubico Inc.	Yubico Inc.
memory capacity	0 MB	0 GB	0 MB	1 GB	0 GB
hardware interface	usb	usb2.0	usb2.0	usb	usb

Product Description

The YubiKey 4 combines hardware-based authentication and public key cryptography to eliminate account takeovers. Simply insert into a USB slot and authenticate with a touch. YubiKey 4 authentication is four times faster than typing a One Time Passcode and does not require a battery nor network connectivity so it is always on and accessible.

Benefits

Strong two-factor hardware based authentication
Easy and fast authentication with a single touch
Reduces IT operational costs
Multi-protocol support on a single key
Crush-resistant and waterproof
Made in the USA

Features

Supported protocols: FIDO U2F, smart card (PIV), Yubico OTP, OpenPGP, OATH-TOTP, OATH-HOTP, and Challenge-Response
Secure element hardware to protect cryptographic keys
Crypto Algorithms: RSA 2048, ECC p256, ECC p384
Interface: USB-A
Works on Microsoft Windows, Mac OS X, Linux, Chrome OS operating systems, and on major browsers
Now works with Twitter!
PIV smart card compatible, minidriver available on Windows
Support for PKCS#1


Portable YubiKey 4 stays nearby on your key ring. Its high quality and crush-resistant body stands up to life's little dings.	Waterproof From puddles to washing machines, YubiKey 4 beats water with a sealed design, no batteries, and no moving parts.	It just fits Plug YubiKey 4 into a computer's USB-A port and tap the gold circle to activate. It also works with varying USB adapters.	Easy pairing Follow the easy instructions provided by the services where you choose to pair your YubiKey 4. No software required.

The key to the cloud

YubiKey 4 just works across the most services and applications on the web today. The secret is its multi-protocol design, providing strong authentication and seamless touch-to-sign.


	YubiKey 4	YubiKey 5 NFC
	See Details
Customer Reviews	800	16,057
Price	—	$50.00
USB Port Type	USB-A	USB-A
Form Factor	Keychain	Keychain
Mobile Authentication via NFC		✓
Water and Crush Resistant	✓	✓
Works with Google Accounts	✓	✓
Works with Microsoft accounts		✓
FIDO U2F / FIDO2	Only FIDO U2F	✓
TOTP / HOTP / PIV / PGP	✓	✓

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Product information

Technical Details

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Other Technical Details

Flash Memory Type

‎USB

Item model number

‎YUBIKEY4

Item Weight

‎0.106 ounces

Product Dimensions

‎0.71 x 0.12 x 1.77 inches

Item Dimensions LxWxH

‎0.71 x 0.12 x 1.77 inches

Manufacturer

‎Yubico

ASIN

‎B018Y1Q71M

Is Discontinued By Manufacturer

‎No

Date First Available

‎December 14, 2015

Additional Information

Customer Reviews

4.3 800 ratings

4.3 out of 5 stars

Warranty & Support

Amazon.com Return Policy:You may return any new computer purchased from Amazon.com that is "dead on arrival," arrives in damaged condition, or is still in unopened boxes, for a full refund within 30 days of purchase. Amazon.com reserves the right to test "dead on arrival" returns and impose a customer fee equal to 15 percent of the product sales price if the customer misrepresents the condition of the product. Any returned computer that is damaged through customer misuse, is missing parts, or is in unsellable condition due to customer tampering will result in the customer being charged a higher restocking fee based on the condition of the product. Amazon.com will not accept returns of any desktop or notebook computer more than 30 days after you receive the shipment. New, used, and refurbished products purchased from Marketplace vendors are subject to the returns policy of the individual vendor.

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Customer reviews

4.3 out of 5

800 global ratings

How customer reviews and ratings work

Customers say

Customers like the performance, security, and build quality of the flash drive. For example, they mention it works well, adds another layer of security, is dependable, and can take a total beating without cracking. That said, opinions are mixed on ease of installation, value, and quality.

AI-generated from the text of customer reviews

116 customers mention101 positive15 negative

Customers like the performance of the USB drive. They say it works well for them, it works great on a PC, and is an excellent device. Some say it's quite useful and works instantly without the need to re-type passcodes. They are also happy with the PIV smart card application and the PGP support.

"...Support for PKCS#11CORE YUBIKEY FEATURESWorks instantly, no need to re-type passcodes from a device — replacing SMS texts, authenticator..." Read more

"...Either way this YubiKey 4 is slick and I'm digging it...." Read more

"...Also, the YubiKey works well in conjunction with a Nexus tablet and an OTG cable...." Read more

"This is an excellent device and I strongly recommend it if you use a password manager that supports it (Last Pass, Dashlane, etc)...." Read more

58 customers mention53 positive5 negative

Customers are satisfied with the security of the flash drive. They mention that it helps keep 2-factor security easy to use, adds another layer of security, and is one of the best tools to keep your accounts secure. The secure elements guard your encryption keys and it's a great piece of hardware for security purposes.

"...Hardware secure elements guard your encryption keysRSA 4096 for OpenPGPSupport for PKCS#11CORE YUBIKEY FEATURES..." Read more

"...is also very easy to use for the most part, and you can even run the authentication servers on your own..." Read more

"...That said, it's still a decent way to prevent unauthorized access to your PC/laptop though there are much better ways to do it, and without using..." Read more

"...benefit of this device with a Password Manager is you can enable two factor authentication to add a new device capable of signing into your account...." Read more

37 customers mention34 positive3 negative

Customers are satisfied with the build quality of the flash drive. They mention that it is well-made, durable, and dependable. They also appreciate the hard plastic material that can take a total beating without cracking. Overall, most are happy with the product's quality and performance.

"...I've been using it for a few months and I like the form factor, build quality, and it always works correctly...." Read more

"...Having used a previous Gen2 Yubikey for years, they are near indestructable, cheap, easily provisionable, and have good management software." Read more

"...Fits great on my keychain and feels sturdy enough to take some abuse...." Read more

"...Big let down for an otherwise good quality product made in US.Hopefully they consider fixing this issue soon." Read more

15 customers mention12 positive3 negative

Customers like the usability of the flash drive. They say it's a convenient little device, a simple product with many applications, and a great tool. Some say it saves them lots of time in day to day use.

"...Gen2 Yubikey for years, they are near indestructable, cheap, easily provisionable, and have good management software." Read more

"This is an amazing little gadget, but for those of us not in IT, it is difficult to understand why you would want to use it. First of all:..." Read more

"It's a simple product with many applications.Pros:-..." Read more

"...not have the capability to require Yubikey for OS login, so not really useful as 2FA in an office environment." Read more

14 customers mention14 positive0 negative

Customers like the multi-factor of the flash drive. For example, they mention it's a great device for power users, great for multi-facture authentication, and very versatile. They appreciate the multiprotocol support and multiple configurations that can be stored. That said, some complain about the poor documentation.

"...I can also testify that these are great for cross platform setups...." Read more

"...It's much faster and I like the multi-protocol support. Fits great on my keychain and feels sturdy enough to take some abuse...." Read more

"...Pretty cool feature by not allowing anyone the ability to log into my computer without user the YubiKey...." Read more

"Pros: many supported protocols for almost any servicesCons: poor documentation" Read more

80 customers mention48 positive32 negative

Customers are mixed about the ease of installation. Some mention that the setup and configuration is easy to follow, fantastically simple, and easy to implement for security. However, others say that the documentation and setup programs are abysmal, take some real effort to understand, and do not come with instructions.

"...The Yubico OTP API is also very easy to use for the most part, and you can even run the authentication servers on your own..." Read more

"...I know what the terms mean. But their documentation fails to specify the significance of them or what the implications are of choosing one over the..." Read more

"...Easy as could be, with all of the info on the Lastpass and Yubi sites...." Read more

"...Setup was easy and straightforward. Problem is: these keys are not compatible with much of anything at the moment...." Read more

18 customers mention12 positive6 negative

Customers have mixed opinions about the value of the flash drive. Some find it to be a great product at a good price, while others say it's a little pricey.

"...used a previous Gen2 Yubikey for years, they are near indestructable, cheap, easily provisionable, and have good management software." Read more

"Overpriced but works. If you want it to work with your phone get the near field one...." Read more

"...Small price to pay." Read more

"...But overall it is a great, flexible, and inexpensive device that offers a number of security benefits for those who need them...." Read more

9 customers mention3 positive6 negative

Customers have mixed opinions about the quality of the flash drive. Some say it's a great concept with lots of potential, while others say it has flaws and is not consumer grade. The software is closed source and not subject to wide review or audit.

"...This is *not* consumer grade electronics (even though they market it as such) and it is *not* documented sufficiently for an enterprise deployment...." Read more

"It works, but it is pretty confusing to configure. Lots of potential, but requires some pretty arcane security standards knowledge to make it work..." Read more

"I brought Yubikey 4, the product is great, but the design has one major flaw...." Read more

"...Unfortunately, the YubiKey 4 is glitchy. About 75% of the time, I have to make multiple attempts to properly authenticate...." Read more

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Top reviews from the United States

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Joe

Great build quality FIDO U2F + More. Highly recomeneded.

Reviewed in the United States on September 1, 2016

Verified Purchase

This is an excellent 2FA token. I've been using it for a few months and I like the form factor, build quality, and it always works correctly.

Below is copied direct from the YubiKey Website.
SPECIAL YUBIKEY 4 FEATURES
Works on Microsoft Windows, Mac OS X, Linux operating systems, and on major browsers
Supports multiple authentication protocols, including Yubico OTP, smart card (PIV), and FIDO U2F
Hardware secure elements guard your encryption keys
RSA 4096 for OpenPGP
Support for PKCS#11
CORE YUBIKEY FEATURES
Works instantly, no need to re-type passcodes from a device — replacing SMS texts, authenticator apps, legacy OTP tokens, and similar devices
Identifies as a USB keyboard, smart card and smart card reader — no client software or drivers need to be installed, no batteries, no moving parts — and works over USB
Crush-resistant and waterproof; YubiKey 4 is practically indestructible during normal use
The keychain size weighs only 3g, and attaches to your keychain alongside your house and car keys; the smaller nano size weighs only 1g and fits inside your USB port
Integration within minutes with free and open source server software
Manufactured in USA and Sweden with high security and quality

FIDO U2F is an emerging open authentication standard, with native support in platforms and browsers. U2F breaks the mold for high security public key authentication, removing the complexity of drivers, specialized client software, and the traditional costly CA model. With FIDO U2F, one single YubiKey 4 or YubiKey 4 Nano supports any number of online services, with no user information or encryption keys shared between the service providers.

2 people found this helpful

Helpful

Double R

Great

Reviewed in the United States on December 31, 2017

Verified Purchase

YubiKey 4 - I use it as a OTP - One time password. Specifically you can you use it on Google login or like I use Bitwarden password manager which is awesome, that is another story. Just plug and play this thing into google as a second verification. You will go into google login area once you are in to set it up. It will tell you to insert it and press the button. Once you press it you see a bunch of ******** being written. Then you are done, click save. Next time you login you will be prompted to have the key ready to press to login. This is in addition to your normal password.

You can get away cheaper by buying a FIDO U2F key which works great with google as well and is a bit more secure. But either one is worlds better than just using a password. FIDO U2F only seems to work with the Chrome Browser at this time and it works well too. I can use the YubiKey 4 with Firefox but FIDO U2F will not work. So whatever you want be aware of this. If you have a grudge against Chrome then you better get the Yubikey 4 as it works with other browsers as long as they support it. Password managers are catching onto this newer tech security and that's good.

Either way this YubiKey 4 is slick and I'm digging it. I may get the YubiKey NEO so I can use the NFC reader in my phone to unlock my password manager there but for now I will let technology catch up before I go NEO.

One last thing you do not need to do any programing with either of these keys on any manufactures web site or use any program to do so. They come from the factory ready to use as long as the website supports them. Although the YubiKey 4 can be programmed and open up other paths to security but i cannot comment on that because I haven't done that yet and maybe I won't since what I need these to do has been done.

4 people found this helpful

Helpful

Austin Seipp

A great multi-factor device for power users

Reviewed in the United States on July 21, 2016

Verified Purchase

An excellent multi-factor authentication token. As a programmer, it supports everything I need: HOTP, Yubico OTP, U2F, static passwords, OpenPGP smartcard support, and the most recent version of the Yubkey 4 with the 4.3.1 firmeware even supports attestation features for cryptographic signatures, etc. It also supports TOTP, but due to the lack of a clock on the device, you must synchronize the clock through a separate authenticator application. There is no iOS version of this authenticator, but desktop and Android versions exist. It's otherwise standard TOTP RFC compliant, much like Google Authenticator.

Note that this model does not support NFC (and the Yubikey with NFC support doesn't have all the Y4 features, either). So, make your choices wisely.

If you are a programmer and want to add 2FA to your applications, the Yubico OTP option is an excellent choice, even if non standard. All Yubikeys are preconfigured by default to use a Yubico OTP configuration in their default slot, and these are registered when they ship you the device. This makes initial rollout dramatically simpler. The Yubico OTP API is also very easy to use for the most part, and you can even run the authentication servers on your own (if you buy a compatible TPM module like the YubiHSM). I integrated Yubico OTP into one of my applications in an hour or so, and the net effect is anyone can plug in a newly bought Yubikey, right out of the box, and add 2FA to their device in seconds, without QR codes or smartphones.

The addition of U2F is nice. Unfortunately it is only supported by Chrome at the moment, or Firefox with a 3rd party extension. I'm a Chrome user mostly, but I still find this particular bit somewhat disappointing - it's somewhat of a minor amount of lock in. If you're using U2F, I strongly suggest also making sure you support regular TOTP or Yubico authentication as a backup for any users, of course, who want to migrate. Hopefully Mozilla, Microsoft and Apple will follow through with U2F support in time.

As a programmer, in particular, having a stable smartcard compatible device to manage GPG and SSH keys is also extremely powerful, but I admit I have not taken the plunge yet. This requires GnuPGP 2.1 at minimum for the most recent features, like ECC support. These devices also do not support every signing or cryptographic protocol, obviously. From what I can tell: if you're using 2k/4k RSA keys, then you're good for PIV/attestation, GPG and SSH support. If you'd like to use ECC, you will have to settle on ECDSA via NIST P-256 or NIST P-384 for your GPG and SSH keys. Finally, if you want ECC for PIV/attestation, you *only* get secp256r1 or secp384r1. If you're like me and have ed25519 keys, you're totally out of luck.

However, overall this is an excellent product, and I highly recommend it. Having used a previous Gen2 Yubikey for years, they are near indestructable, cheap, easily provisionable, and have good management software.

8 people found this helpful

Helpful

Top reviews from other countries

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Zygmund

Woks pefectly.

Reviewed in Canada on September 30, 2022

Verified Purchase

The Yubikey works flawlessly and does everything and more one needs. I have purchased it to enter complex passwords and pin numbers into any software requiring robust security controls. Examples; Bank accounts, Password Managers, Computer log-in, websites, etc.

The only problem I have is that I have purchased and paid for a NEW Yubikey but I have received a USED one. As I’m suffering from security paranoia I hope this (used) key doesn't have a built-in chip/malware sending out the password to an unscrupulous entity.

Paolo

Robusta e funzionale

Reviewed in Italy on December 6, 2018

Verified Purchase

Rispetto alla versione più vecchia è più spessa e robusta, quindi non si ha paura di romperla in ogni momento). Io uso le funzionalità OTP e GPG, non ho avuto modo di usare il supporto per UDF ma c'è anche quello.

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Jorge d.

Perfecta

Reviewed in Spain on August 20, 2018

Verified Purchase

Funciona perfectamente además de ser muy sencilla de utilizar, también funciona en el teléfono si la conectas a través de un puerto OTG. También cabe destacar que los materiales son bastante buenos y parece que durará bastante tiempo.
Con todo lo anterior dicho cabe añadir que es muy útil para añadir otra capa de seguridad a tus cuentas, además que la aplicación de Authenticator de esta marca es mucho mejor que la de Google, ya que no solo permite tenerla tanto en dispositivos móviles como en el ordenador, sino que además en cuanto conectas la llave a un dispositivo con la aplicación recién instalada se vinculan todas las cuentas que tenías configuradas permitiendo aorrandote que en el caso de por ejemplo cambiar de móvil, tener que configurarlo todo otra vez.

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Rohit Kumar

the CCID smart card features are lacking if you want to use ...

Reviewed in India on February 27, 2018

Verified Purchase

It's a neat little tool for securing your online accounts. However, the CCID smart card features are lacking if you want to use it for storing your digital signature certificate issued in India as the Windows driver always thinks of the card being in read only mode. I'm not sure whether it's an issue with the Windows driver or with the device itself. I was using Windows 10 with the most up to date version as of 2018-02-27. Let's hope the driver or wherever the issue lies is resolved by the time I need to renew my DSC ¯\_(ツ)_/¯

One person found this helpful

Customer

Amazing, fun, extremely secure.

Reviewed in the United Kingdom on September 27, 2017

Verified Purchase

In this day and age you really need to have a two factor device of some kind. The U2F feature inside this (and there's a cheaper blue product of theirs which only has that on and non of the more advanced things) is super easy to use FOR services that use it like google, twitter, facebook and others. You just insert and press the button when prompted and the website sends some data to your Yubikey, it processes it and hands back the result to the site, which can then confirm if it is the same device, aka the one you really have.

Some of the other features are great too, like using their Authenticator program (and app on your phone if you buy the Neo version of the Yubikey or a different one that plugs into a phone by USB C) to store between 28 and 32 different site and services OATH OTP credentials, which are the ones you would normally have to use google authenticator on your phone to deal with.

You can lock your computer with this and ensure even someone knowing your computer password cannot log in or unlock the PC without having your Yubikey also.

You can use advanced encryption and "smartcard" based encryption and authentication systems. There are tons of possible features on this device.

I highly recommend it. Look on YouTube and see tutorials of people using it.

3 people found this helpful

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Brand	Yubico
Hardware Interface	USB
Special Feature	Lightweight
Connectivity Technology	USB
Color	Black

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Yubico - YubiKey 4 - USB-A, Two-Factor Authentication

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