OnlyKeyDuo - The Best Protection for All of Your USB-C and USB-A Devices

Delivery overseas was insanely fast.There are a lot of feature, and a lot of possibilities for your security set up.For a basic usage, it is quite fast and intuitive to configure. I appreciate how small it is for a key meant to be left permanently attached to my laptop.The "finger touch" interface works surprisingly well, but could be improved. For Linux, the companion app could be better integrated with the OS for a faster, easier unlocking of the device using pinentry or something...Overall, a complete security solution for a very low price. Not forgetting that this is the only one I found with a backup feature ! I recommend.

Once you get the hang of it, it does the job really well. It can be annoying to handle in the beginning as the buttons are tiny. Not for the impatient. After using it for a week, it is now really easy to use. The trick is to barely touch the edge of the buttons or use a pen or another sharp object. Been able to use it on both laptop and cell is a great advantage. Great defense against keyloggers. Overall really happy.

I'll start with a disclaimer; I'm a software developer. This device is exactly what I was looking for and provides a lot of control, but it could be overwhelming for less technical users. There are more simple products which still provide very good security.With that out of the way, this device is amazing. It has the usual hardware key functionality (FIDO2/U2F/WebAuthn) which gives very secure authentication with a single tap. Unfortunately, many websites don't support these standards and TOTP (Google Authenticator) is more popular. That's okay, because you can register a slot on this key to type the six digits, much like it can with a password!It has 6 slots per profile with 4 profiles, so 24 slots in total. Each slot can store a URL, username, password and a 2FA key.All of that and it's secured by a pin which you can put into the device itself, which will protect you from keyloggers. If you're not worried about that, you can type the pin into the app too.For the nerds, this key has its own support for SSH and GPG keys. I prefer to use the U2F functionality in the newer version of SSH, but both work well.A few things you should know:- TOTP only works if you're running the app (also available as a web app) because the key needs to know the time. Not a big deal, just something to be aware of.- The minimum pin length is 7 digits. This is probably reasonable on the original OnlyKey, but it's fiddly on this one. If your dexterity isn't great, you'll have a bad time. You can put it in on the app instead, but the original OnlyKey and an OTG adapter might be better suited to you.- There's no mobile app. You can use the web app, but this only provides the time to the device (for TOTP) and message/file encryption.Even with those caveats, I'm really happy. I don't think there's another hardware key which ticks the same boxes as this one.

Didn't work with any device. Lights are on, but it's a brick. White plastic peeling from using the usb insert. Waited to use it, glad it didn't brick with all my info on it, but can't take it back.

Love the idea of the Duo. I have two regular OnlyKey's so I know how they work and think they are very useful.I wanted to leave this in the laptop most of the time and have something a bit easier to store and carry.Like another reviewer stated though, it's such a TIGHT fit. I don't know the USB specs and don't have a caliper on hand, but I'd bet my laptop that the DUO is not within the USB specs. I plugged it into my Asus Zenbook, and another system and I'm surprised it hasn't damaged the ports. It's incredibly tight to remove and I can definitely see it breaking like the other reviewer as I cant remove it by hand. I have to attach the keyring adapter on it to pull it out.Works with the supplied USB-C adapter but that totally defeats my use case of having it left in the laptop most of the time.I'll be returning it sadly. Great concept. Not great in reality.