Can I use it if I purchase a USB-C adapter ? And it will still work?

It would probably work, but they also sell them that have USB-C connectors, so I would just by one of those instead.

There is another one on here for $50. Yubikey5 , besides this being 50% cheaper , are these the same keys?

No. The YubiKey 5 has more functionality than the Security Key. The Security Key only supports FIDO U2F / FIDO 2. The YubiKey supports much wider range of authentication methods, but if you only need the ones supported by this key then you can save a lot instead of buying YubiKey 5.

Does this plug into a regular USB port?

It only fill 1/2 the USB slot, but it works as advertised.

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Yubico - Security Key NFC - Basic Compatibility - Multi-factor authentication (MFA) Security Key, Connect via USB-A or NFC, FIDO Certified

Yubico - Security Key NFC - Basic Compatibility - Multi-factor authentication (MFA) Security Key, Connect via USB-A or NFC, FIDO Certified

Product ID: 518466069

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Details

Brand
Yubico
Hardware Interface
USB
Special Feature
Durable
Connectivity Technology
USB
Color
black

💧Water & crush resistant

🔌Dual USB-A & NFC access

🔐FIDO2 & U2F protocols

Description

🔐 Unlock elite security with effortless style.

BUILT TO ENDURE - Rugged design resists water, crushing & tampering for reliable protection.
PLUG TAP CONVENIENCE - Authenticate instantly via USB-A or NFC—no batteries, no hassle.
CROSS PLATFORM CHAMPION - Effortlessly compatible with Windows, macOS, Linux, ChromeOS & top services.
PASSWORDLESS POWERHOUSE - Seamlessly supports FIDO2 & U2F for next-gen MFA security.
AFFORDABLE SECURITY UPGRADE - Elite FIDO-certified protection without breaking the bank.

The Yubico Security Key NFC offers robust multi-factor authentication using FIDO2 and U2F protocols, enabling passwordless and second-factor login via USB-A or NFC. Compatible across major operating systems and services, it delivers durable, battery-free security in a compact, water- and crush-resistant design—perfect for professionals seeking affordable, reliable protection.

Specifications

Model Name	Security Key
Product Dimensions	3.94"D x 3.94"W x 3.94"H
Flash Memory Type	USB
Manufacturer	Yubico
Hardware Connectivity Technology	USB Type A
Global Trade Identification Number	05060408465295
Hard Drive	16 GB Portable
Item model number	5060408465295
Hardware Platform	Mobile, Laptop, Desktop, Windows, macOS, ChromeOS, Linux
Item Weight	0.353 ounces
Item Dimensions LxWxH	3.35 x 2.17 x 0.04 inches
Hard Drive Interface	USB 1.1
ASIN	B0BVNPWPCN
Date First Available	January 24, 2023

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