Cryptnox FIDO Card - Fido2 Certified - Security Key for iPhone - NFC Communication - Passwordless or 2FA authentication - FIDO2 (CTAP2) & U2F(CTAP1) (Black)

NFC communication works flawlessly, you just need to position the card correctly according to the phone model. Holding it to the top back of the phone gives the best results on my iPhone 13 Pro. Using it as a two-factor authentication is quite simple. I set it as the second factor on my Gmail, Dropbox and Twitter accounts, and now I provide extra security by touching the card to my phone in addition to typing the password when logging in. I also want to try the passwordless login option, I haven't found the time yet, but this feature also seems very appealing. It also performs as promised in terms of compatibility. It works flawlessly with both iOS and Android devices. I also use it with a smart card reader on my Windows computer and have had no problems so far. It is also quite successful as a security key for the iPhone. I installed it as Apple recommended and use it to protect my Apple ID. Although Apple's requirement of at least two devices is a bit troublesome, it is a reasonable precaution when it comes to security.

Setup takes no time at all, working instantly without any software headaches. NFC detection is smooth, requiring just a quick tap to function. The build quality feels premium, not flimsy or cheap. No delays or glitches when using it across different platforms, making it a reliable addition for security purposes. The convenience of passwordless access works seamlessly with supported sites, eliminating the need for remembering multiple credentials. It’s compact enough to carry without worry, fitting easily into a wallet without taking up unnecessary space. A secure, fuss-free solution for everyday use.

Size and shape of a credit card. No identifying marks on the card to show what it is, although to an extent a completely blank card, does indicate it is a security key of some sort. I have put on a credit card sticker you can place on the front of cards to both personalise them and to anonymise the cards front.Setting up was simple and straight forward on an IOS device against the apple account. As with most apps or services you want to set this up for it is where the options for setting two factor authentication are. Once setup it works simply via the NFC reader and positioning the phone is the same as for Apply Pay or reading Smartcards (such as Oyster, Train Companies or Credit cards).This does support both FIDO2 (CTAP2) and U2F (CTAP1). Some banks and credit card companies may not support FIDO2 so having legacy support for U2F is useful.The one thing I hadn’t considered is that when you set up using a FIDO2 card, many services do not allow concurrent use of authenticator apps. I am concerned about what happens if I lose/misplace this card and will do more investigation before I fully switch over to using FIDO2 cards.

Very cool-I've been trying to improve my security recently, the this card has helped me do so. It's a very sleek card in plain white with nothing clearly identifying what it is, which is good. It does suggest it's a security key but nothing else besides that. I was quick and easy to setup on iOS and then I could use this as a way of two factor authentication on apps. It works via NFC so you just move it around near the back middle or back top of your phone to use it-Current price £26 for one card

Cryptnox FIDO Card - Fido2 Certified - Security Key - Price when reviewed £ 26.99Despite the description saying this card is compatible with Android, I cannot make it work. This is not helped by the absence of instructions from the manufacturer. The app seems to fail to register the card on my phone, but I'm unsure if it's the app, the card or user error.

With passkeys and other passwordless security methods being accepted for increasingly large numbers of services, security keys like this one are a potential good alternative to using on device solutions like fingerprint. I checked this one out from Crypto company Cryptonox.Set up first and this is relatively straightforward on an iOS device once you've found the on phone menus though I didn't manage to get it to work with Android - not a huge surprise given it's not promised but it would be useful to have cross device support. Most phones will interact with the card with NFC which reads it quickly though you will likely need another adapter or a built in reader to use the chip or NFC on a laptop. The card itself is similar to any other credit card though with nothing printed on it.Overall then if it works with your set up it's a great option to add to the overall security, however make sure you have everything you need before you get started.

I’ve recently been getting a bit more into security and using authentication for a lot of my logics. It just seems to be the way the world is going. On my iPhone it uses certain apps and Face ID, which works well, but I wanted to see how this would work.Setting it up is surprisingly simple and then it just taps the back of the phone as a key. I’ve seen that it will work with a lot of NFT devices that can be used with computers and so on so this will work with those.I do like how simple it is and there’s no real indicator of what it does. It’s just looks like a payment card. For the cost it does as it says and it’s simple to use. I’m happy with it.