FIDO2 Security Key, Two Factor Authentication (2FA) NFC Security Key, Connect via NFC for Microsoft, Apple, Google, Facebook, Dropbox, Mifare DESFire, Convenient Card Format, FIDO Certified

I bought this without really knowing much about it, but needing to set up a 2FA on my Nicehash account. I tried to get some sort of support for this and eventually gave up because I couldn't figure out how to use it with Nicehash. It does work with some of the other accounts like Google and Microsoft. It uses NFC communication and is supposed to be compatible with Apple, Android and Windows, and with most browsers. In order to use it with a computer, you will need a card reader, which I had to buy separately since my computer didn't have one. For the phones, you just need to find where the NFC reader is, generally either the top or center, and make sure you align it correctly to get it to read your card. This card looks like a credit card, so it is easy to carry in your wallet, making it extremely easy to carry. So far mine is holding up well despite repeated use and being carried around in my wallet constantly. If you have a card reader or a phone that is NFC capable, and you want to set up 2FA, this might be a good option for you.

This works as expected. I wanted multiple 2FA items and types. This key is just like any credit card and stays in my wallet to use. I also have a separate USB-C and NFC key for backup. I've tested this and it works as expected. Very happy with the product.

It is a great way to secure your accounts. I have been using yubikey for long for 2FA of my accounts but I cant take yubikey with me everywhere. I can take this card with me anywhere in my wallet. Also, it was very easy to setup. highly recommended.

To be fair, they don't specify that it doesn't work with Linux, however, they sell a card reader that works on Linux, which made me think "just maybe?", but it wasn't the case.

I had a Thetis key that worked well with Login.gov, but I wanted a second technology to use when I retire. I had been using a government CAC card with a Belkin CAC Card Reader - Smart Card Reader with USB Connection. I was a bit worried when I got the Cryptnox FIDO2 Security Key because the card I received has a smaller 7 contact pad vs the larger 9contact pad shown, and the CAC card has the larger 9 contact pad. The reader worked flawlessly. There are no instructions that come with the card, so I am glad I did a bit of reading first. Windows 10 set the card up with no problem. I went Settings - Accounts - Sign-in Options - Security Key - Manage and Windows had me set a pin for the card. After that, I was able to go to Login.gov pages and add the card as a new/additional security key. When I went to my Social Security and other sites that use the Login.gov for verification, the new card worked flawlessly; when it asked to push a button, I just removed and reinserted the card. I recommend this card for Windows and/or Login.gov use.

Doesn't work at all on android. The app is trash, gives error when scanning card. Also, the app doesn't work for the basic saving and printing of your pin etc, it just prints all zeros instead of the pin and code. Don't waste your time or money.

I wanted to find a key that would work in smartcard readers as I am sometimes in a situation where no USB is available. This card did the trick, specifically for Microsoft (business & personal) accounts and Bitwarden. No software needed, same experience as yubikey, just asked to establish the PIN on first use. The NFC also worked well on my Andriod phone.The one issue that I did encounter was when registering as a security key for my Microsoft Business account. As the card is only FIDO2 Level 1 certified (this might not be the only reason), Microsoft Business accounts default settings do not allow it to be used. I had to toggle the "Enforce attestation" to off. Hopefully this is something that gets worked out in the future and my only reason for not giving a 5 star review. I will try other cards as I find them and update this review if one works with attestation.

So I bought this not fully understanding what Fido security was. I was interested in the technology since I have a dell rugged computer with a card reader built into it. I’ve since used the card everyday and carry it in my wallet. I work in the oil fields so my wallet and cards take a beating and this card has held up well so far.