YubiKey is an innovative USB and NFC security key. It offers an easy and secure way to log in when static passwords are being hacked at scale, and SMS and other authentication technologies cannot offer enough protection against phishing and more sophisticated attacks.
Instant Integration
Indestructible
Top-notch security
Trusted by millions
Security made easy
YubiKey 4
Millions of people use YubiKeys for 2FA because they’re the easiest to use, super secure, and affordable. Plug in your YubiKey and tap it to log in to your computers, networks, and online services. Keep one on your keychain with the key to your house/car, and a second YubiKey in a safe place as a backup.
YubiKey 4 fits on your keychain and plugs into USB-A ports
YubiKey 4C fits on your keychain and plugs into USB-C ports
YubiKey 4 Nano is perfect for semi-permanent installation and plugs into USB-A ports (Lanyard add-on available)
All-in-one configurable security key
Different services use different types of security protocols. YubiKeys are capable of performing multiple protocols, so you can use the same key for almost an unlimited number of services.
YubiKey NEO
In a single device, the YubiKey NEO has both contact (USB) and contactless (NFC, MIFARE) communications. It supports one-time password, smart card functionality, including OpenPGP and PIV, and the emerging FIDO Alliance Universal 2nd Factor (U2F) protocol.
If NFC is not required, or if the smaller Nano form factor is preferred, we recommend customers purchase the YubiKey 4 or YubiKey 4 Nano, our latest generation YubiKey, which include stronger and faster crypto.
WHERE YOU CAN USE YUBIKEY NEO
The YubiKey NEO can be used for securing access to a wide range of applications, including remote access and VPN, password managers, computer login, FIDO U2F login (Gmail, GitHub, Dropbox, etc) content management systems, popular online services, and much more. Find out more about the range of open source and enterprise solutions on our YubiKey for Business and YubiKey for Individuals pages.
YubiKey FIDO
The FIDO U2F Security Key by Yubico is a specially designed YubiKey, relying on high-security, public-key cryptography. Durable and conveniently sized, just slide it out of its protective sleeve, insert it into any USB port, and it works with any website that supports the FIDO U2F protocol, such as Facebook, Google’s Gmail, Google Cloud and G Suite, GitHub, Dropbox, and Dashlane. And all it takes is a simple touch of a button!
The skinny on universal 2n factor (U2F)
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 supports any number of online services, with no user information or encryption keys shared between the service providers. Learn more about FIDO U2F.
Compare YubiKeys
| YUBIKEY 4 | YUBIKEY 4 NANO | YUBIKEY 4C | YUBIKEY NEO | FIDO U2F SECURITY KEY | |
|---|---|---|---|---|---|
| Availability | 
$40 per key |
$50 per key |
$50 per key |
$50 per key |
$18 per key |
| USB authentication key, including strong crypto and touch-to-sign, plus One-Time-Password, smart card, and FIDO U2F; three form factors Learn more about the YubiKey 4 series |
Combines USB and NFC for mobile communication, enables One-Time Password, smart card, and FIDO U2F authentication | USB authentication key that works instantly with any service that supports FIDO U2F | |||
| YubiKey 4 | YubiKey 4 Nano | YubiKey 4C | YubiKey NEO | FIDO U2F Security Key | |
| Size | 18mm x 45mm x 3.3mm, 3g | 12mm x 13mm x 3.1mm, 1g | 12.5mm x 29.5mm x 5mm, 2g | 18mm x 45mm x 3.3mm, 3g | 18mm x 45mm x 3.3mm, 3g |
| Functions | YubiKey 4 | YubiKey 4 Nano | YubiKey 4C | YubiKey NEO | FIDO U2F Security Key |
| Secure Static Passwords |  |
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| Yubico OTP | |
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| OATH – HOTP (Event) | |
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| OATH – TOTP (Time) | |
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| PIV-Compliant Smart Card | |
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| OpenPGP | |
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| FIDO U2F (Universal Second Factor) | |
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| Secure Element | |
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| Top Applications | YubiKey 4 | YubiKey 4 Nano | YubiKey 4C | YubiKey NEO | FIDO U2F Security Key |
| Google Accounts | |
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| Facebook Accounts | |
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| GitHub | |
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| Docker | |
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| Dropbox | |
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| Salesforce | |
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| LastPass Premium password manager | |
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| Dashlane Premium password manager | |
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| Many more applications | |
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| Certifications | YubiKey 4 | YubiKey 4 Nano | YubiKey 4C | YubiKey NEO | FIDO U2F Security Key |
| FIDO Certification™ program | |
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| FIPS 140 Certification | |
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| Communications Support | YubiKey 4 | YubiKey 4 Nano | YubiKey 4C | YubiKey NEO | FIDO U2F Security Key |
USB-A  |
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USB-C  |
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| NFC (Near Field Communication) | |
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| Device Type | YubiKey 4 | YubiKey 4 Nano | YubiKey 4C | YubiKey NEO | FIDO U2F Security Key |
| HID Keyboard | |
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| CCID Smart Card | |
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| FIDO U2F (Universal Second Factor) HID device | |
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| Cryptography Specifications | YubiKey 4 | YubiKey 4 Nano | YubiKey 4C | YubiKey NEO | FIDO U2F Security Key |
| RSA 2048 | |
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| RSA 4096 | |
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| ECC p256 | |
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| ECC p384 | |
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