Overview

  • Security Key Series vs. YubiKey 5 Series
    The Security Key series supports only FIDO protocols (FIDO2, U2F) and is not compatible with the Yubico Authenticator app. Some services require a YubiKey 5 Series for full compatibility. For broader protocol support, including OATH, PIV credentials, and computer logins, consider upgrading to the YubiKey 5 Series.
  • Works best with a spare YubiKey
    A spare YubiKey ensures easy access to your accounts even if your primary YubiKey is lost, providing security and convenience when you need it most. Your spare key can be a different form factor than your primary key, and it will still function the same, as long as both keys are from the same YubiKey series.
  • Convenient and portable
    The Security Key C NFC fits easily on your keychain, making it convenient to carry and use wherever you go, ensuring secure access to your accounts at all times. Simply plug in via USB-C or tap on your NFC-enabled device to authenticate.
  • Versatile compatibility
    Supported by Google and Microsoft accounts, password managers and hundreds of other popular services. It works with Windows, macOS, ChromeOS and Linux. Search for “Works With YubiKey” for list of compatible services.
  • FIDO-only protocols
    Security Key Series is the more affordable security key supporting only FIDO2/WebAuthn (hardware bound passkey) and FIDO U2F authentication protocols. For improved compatibility upgrade to YubiKey 5 Series.
  • Durable and reliable
    High quality design and resistant to tampering, water, and crushing. No batteries or network connectivity required, offering dependable authentication without any downtime. Securely manufactured in USA & Sweden.

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Specifications

Capacity & configuration

Connector Type(s)
USB-C

Dimensions & weight

Product Name
Security Key C NFC - Two-Factor Authentication Security Key, Connect via USB-C or NFC, FIDO U2F/FIDO2 Certified
Product Height
0.14 inches
Product Length
0.7 inches
Product Width
1.73 inches
Product Weight
0.15 ounces

Features

Brand
Yubico
Color
Black
Wireless Connectivity
NFC
Operating System Compatibility
Windows
System Requirements
Windows 10 or later, macOS 11 or later, Ubuntu 22.04 or later, Android 11 or later, iOS 15.0 or later, iOS 15.0 or later
Authentication and Cryptography Protocols
FIDO2, FIDO U2F, WebAuthn
Ingress Protection (IP) Rating
IP68
UPC
5060408465301

Power & warranty

Model Number
100957/992-40014/8880001089
Warranty - Parts
1 year limited
Warranty - Labor
1 year limited

Warranty & protection

Included manufacturer warranty

See manufacturer documentation.

Register your product with the manufacturer within 30 days of delivery.

Warranty service

Manufacturer warranty claims are handled by the manufacturer. We are happy to help you find the right contact: (888) 419-6820.

Customer reviews

Write a review
KENNETHEOct 13, 2026 · Verified purchase ★★★★★

Yubikey - I very happy and it always arrives on time from Best buy.:-)

YoungSep 25, 2026 · Verified purchase ★★★★★

Meet my needs! - Can be used to tie with financial institution such as bank

JokerSenpaiSep 20, 2026 · Verified purchase ★★★★★

Small and Useful - It’s simple to use, and shipping was quick. However, it isn’t compatible with most of the applications I use, which limits its usefulness for my particular use case. I was still able to use it to secure my Outlook and Gmail accounts, so overall it has been useful for what I needed it for.

DoingthisreviewforpointsSep 11, 2026 · Verified purchase ★★★★★

Great for on the go. - I'm always afraid of accidentally giving my password and info out so this makes me sleep a lot better at night. Also this one is USB C so it's really convenient for smart phones. Be careful though, I had to set it up on my laptop first before using it on my phone, I think it's due to it being so old? But past that 5 stars

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Questions & answers

Ask a question

Email [email protected] or call (888) 419-6820 during business hours.

Free U.S. shippingOn every order. Leaves our store in 1–2 business days, arrives in 3–5 business days.
Free returns for 30 daysNo restocking fee. We email you a prepaid return label.
We can install it tooOptional in-home delivery, installation and haul-away on large appliances.
Talk to our team(888) 419-6820 · Mon–Sat