Does this work as a two-factor authentication method for signing into outlook.com? If so, which browsers are supported?

Sure does. In fact with Edge you can setup password-less logon to outlook.com. with chrome and Firefox you can just use it as a second factor after the username and password.

Does this have any kind of backup in case you lose it like some software based 2FA does? Or is it game over if it goes wandering?

You use this device as a 2 factor authorization which works with 3rd party software which you purchase separately .It has no software itself. It simply contains a chip which generates a Code which your software recognizes and as it needs to be Physically pressed by a human being it is not possible for hackers to program software to activate it. If you lose it you simply deactivate your device in you software of choice. For example you could use it with a password manager software which you purchase separately. To login into a software you use a password , that is the 1st factor of Authorization, then you insert your Key and press the button , that is the second factor.So if someone gets hold of your password they still can't login in without your stick. It's almost Bullet proof if you ask me. If you lose your Yubikey and wished to deactivate the Yubikey you would do so via a mobile phone which you used to setup your software in the first place. For example you would receive an SMS or Email depending on the Software producer.

Are these keys available to buy in England, they all seem to come from the US or EU with very long delivery times in many cases and no warranty.

I bought my first two keys from Yubico UK through Amazon last year but don’t know why they don’t appear here anymore. I bought my third key on Amazon which I think was through Amazon EU. It didn’t take that long to arrive, maybe a week or less. The only other option I can see is if you click on ‘see other sellers’ section and there are UK sellers listed but could be more expensive. Hope this helps.

Can this be used in a normal usb-a port with an adaptor?

Thanks for your interest. Yes, it can be used with the correct adaptor, but we also offer USB-A keys (Yubikey 5 NFC) which may work better for your needs? https://www.amazon.co.uk/dp/B07HBD71HL?ref=myi_title_dp

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Sponsored Ad – YubiKey 5C Nano - Two Factor Authentication USB Security Key, Fits USB-C Ports - Protect Your Online Accounts with More Than a Password, FIDO Certified USB Password Key, Extra Compact Size

Sponsored Ad – YubiKey 5C Nano - Two Factor Authentication USB Security Key, Fits USB-C Ports - Protect Your Online Accounts with More Than a Password, FIDO Certified USB Password Key, Extra Compact Size

Product ID: 87282016

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Details

Brand
Yubico
Hardware interface
USB
Special feature
Access key 100
Connectivity technology
USB
Colour
Black

⚡Nano USB-C plug & play

🔐FIDO-certified ultra-secure 2FA

🛡️Tamper, water & crush resistant

Description

🔐 Stay one tap ahead of hackers with the YubiKey 5C Nano

BUILT TO ENDURE - Rugged tamper-proof, water-resistant, and crush-resistant hardware for daily hustle
MULTI PROTOCOL MASTERY - Supports FIDO2, U2F, OTP, Smart Card & more for versatile authentication
SEAMLESS USB C INTEGRATION - Extra compact design fits flush in your device for always-on protection
UNRIVALED SECURITY ZERO HASSLE - World’s most protective USB-C 2FA key trusted by top apps and services
PHISHING PROOF YOUR DIGITAL LIFE - Stops account takeovers cold with hardware-based authentication

The Yubico YubiKey 5C Nano is a FIDO-certified USB-C security key that provides robust two-factor authentication across hundreds of online services. Its ultra-compact design fits discreetly into USB-C ports, enabling seamless, hardware-based protection against phishing and account takeovers. Built tough with tamper, water, and crush resistance, it supports multiple authentication protocols including FIDO2, U2F, OTP, and smart card, making it the ultimate security companion for professionals demanding convenience and uncompromising safety.

Specifications

Manufacturer	Yubico
Hardware Connectivity Technology	USB Type C, USB Type A
Global Trade Identification Number	05060408461518
Brand Name	Yubico
Item Weight	0.176 ounces
Product Dimensions	0.47 x 0.39 x 0.28 inches
Item model number	5060408461518
Is Discontinued By Manufacturer	No
Data Transfer Rate	48 Gigabits Per Second
Number of Items	1
Model number	5060408461518
Item Display dimensions L x W x H	1.97 x 1.97 inches

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