Is yubico setup for one fingerprint or two? If one, what happens when finger is cut or burned on grill?

Yubico not support fingerprints. It is use for accept human presence. So if you insert yubico in pc or use nfc on smartphone. You can add "required touch" for every authentication operation. Touch approve that it is operation accept by real people. There is not a zero chance, if you do not confirm the action with a touch, then the attacker can use your yubico without your knowledge when you left it in the computer. This mechanism is designed to protect against such attacks.

This is an extremely common device. Why are there only 17 reviews, and even fewer for other Yubico devices?

Likely because people value convenience over security, and this is a secure device. Also, the bad reviews that I've scanned come from people who simply do not understand what multi-factor access means. This device augments your username and password (that which you KNOW) with the device itself (that which you HAVE). When used correctly, if your password is compromised it does an attacker no good unless they have the device as well. for myself, I used separate passwords for various purposes, so a single breach will not place at risk my other accounts. And most are not protected by MFA, since thet are trivial. But for VPN access into my home, and finance accounts, I do use hardware based MFA. A small price to pay for the added protection when there are significant consequences to a single breach.

can a pair of these be set up so one can be used as an emergency backup if the first one is lost?

If you are buying this, you should buy two. Yes, using a second one as a backup is exactly what you want to do. Otherwise, if the first gets lost or broken, you are locked out of the accounts you set up.

Can you use this to auto-fill your passwords so you don't have to remember any?

The YubiKey 5 is a FIDO2-capable key - which does replace password usage in many applications. From the FIDO Alliance website: "FIDO2 cryptographic login credentials are unique across every website, never leave the user’s device and are never stored on a server. This security model eliminates the risks of phishing, all forms of password theft and replay attacks."

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Reviews

T**K

物理的に必要なセキュリティキーです

セキュリティキーの必要が在りましたのでコチラを購入応答反応は一瞬で終わるので使えてます。なおセキュリティキー自体が普通のUSBメモリをパスキー代わりに使う事か？と勘違いしてMicrosoftのサイトで作成方法を探しまくってましたが

12.11.2025

P**ん

AWSのログイン認証もOK

AWSのMFA用に購入。 AWSはMFAを複数登録できるようになったので、2個購入->登録。うち1個はスペアキーとして耐火金庫に保管。問題なく使えてます。

2.05.2024

F**F

NFCワンタッチでgoogleの2段階認証できて良き

SMSで送られてくる数字を入れるのが面倒で面倒でたまらないのでgoogleアカウントの2段階認証用に購入しました。 NFCでタッチするだけでログインできるのでとても便利です。

2.05.2023

J**I

最強

効果絶大です。最強のセキュリティグッズです。

29.04.2021

A**R

So far so good

Nothing to report at this time. Will update as things develop.

3.05.2024

よ**ー

ファームウェアのバージョンアップが出来ない

ファームウェアのバージョンが5.4.3と古く、最新版の5.7.4ではなかったです。アップデートが出来ないので、どうしようも出来ないです。 5.7.4じゃないと返品対象です。在庫がはけていないところから購入するとこうなったのかなと思っています。

11.11.2025

ね**こ

既に二段階認証してあるなら設定がめんどう

2本あるほうがいいと二本購入 15分ぐらい終わると勧めて頂いた方が教えてくれていたが私の場合は2時間近くかかりました。私が不出来なのもあるのでしょうけど既に二段階認証設定してあると色々面倒でした。そしてYubicoの必要性はわかりません。元から別の二段階認証やパスキーがあるなら設定していて思ったのはいらないのでは・・・？でした。でもまっさらの状態での設定は楽でしょうしほかにパスキーなどがないならこちらがないと開かないのでセキュリティとしてはいい鍵だと思います。

3.02.2026

ハ**カ

PCにもスマホにも使える

PCにもスマホにも使える使えて便利あまり使う機会は無いがいざと言う時あるといい

25.02.2023

ASIN	B07HBD71HL
Additional Features	Dust resistant, IP68
Amazon Bestseller	#5,198 in Computers ( See Top 100 in Computers ) #93 in USB Flash Drives
Brand	Yubico
Color	Black
Compatible Devices	Windows, Mac OS, Linux
Compatible Phone Models	Google Chrome
Connectivity Technology	NFC, USB
Customer Reviews	4.2 out of 5 stars 12,005 Your Review
Flash Memory Type	Memory Stick PRO-HG Duo
Global Trade Identification Number	05060408461426
Hardware Interface	USB 2.0
Item Dimensions D x W x H	10D x 10W x 10H cm
Item Type Name	Security Key
Item Weight	0.1 Ounces
Manufacturer	ユビコ(Yubico)
Model Name	YubiKey 5 NFC
Model Number	Y-237
Special Feature	Dust resistant, IP68
Unit Count	1.0 Count
Warranty Description	Replacement warranty for natural failures (1 year)

Yubico Security Key YubiKey 5 NFC Login/U2F/FIDO2/USB-A Port/2-Step Authentication/Heavy Duty/Shockproof/Waterproof

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