Thetis Pro-C FIDO2 Security Key Passkey Device with USB C & NFC, TOTP/HOTP Authenticator APP, FIDO 2.0 Two Factor Authentication 2FA MFA, Works with Windows/macOS/Linux/Gmail/Facebook/Dropbox/GitHub

I’ve been using the Thetis Pro Key for about a month, and I genuinely feel more secure online. Setup was straightforward—it worked flawlessly with both my Google and Microsoft accounts. It’s compatible with Windows, macOS, and even Linux, which is perfect since I work across different platforms. The build quality is excellent—it’s aluminium, not cheap plastic, and feels sturdy enough to survive daily use. The USB-C and USB-A connectors are a nice touch, especially since I use multiple devices. Its obviously FIDO2 certified, meaning it uses strong, phishing-resistant security. No more worrying about SMS codes or authenticator apps being hacked. I even tested it by trying to log in from an unknown device without the key and it blocked me, just like it should. Tip: Make sure you register it on multiple accounts and keep a backup key stored safely in case you lose it. Overall, this is one of the best purchases I’ve made for digital safety. If you care about online security (especially if you're in business, IT, or finance), this is a must-have.

This proved the only way to access our old US-based accounts from the UK as we didn't have US mobile phones for text codes any more. Simple. Easy. Tick.

Fold out design.

This is a very easy-to-set up device - just download the software to get a pin setup on the key, and you're ready to go! The instructions cover set up on Windows, Mac, iOS and Android - you just need to do it on one machine for it to work everywhere. For now, I'm only using this for MFA/2FA with my TOTP being handled elsewhere as I don't want to keep all my eggs in one basket just yet. So far, I've got this set up with my Microsoft and Google accounts, and it was a very easy to get the key set up. When logging in on a Windows desktop, it's just a case of selecting the "Security Key" (which it should default to after the first use) when logging in, and then plugging in this passkey device. When prompted, press the flashing button on the passkey device and that's it! On an iPhone, iOS will natively bring up a log in box prompting you to either connect the key via USB, or with NFC. If you're using NFC, it will ask for the pin you had originally set up, and that's it. This will work for NFC enabled iPhones (iPhone 7 and newer) and of course most Androids. For iPad's, it's a similar process but as they have no NFC features, you just plug it into their Type-C port instead. To add some extra security on top, NFC only works when the device is opened up, so if it's hanging off your keys, someone cannot just brush up past you to initiate authentication. I've only been using it for a short while, so I have yet to pick up any quirks except one - my iPhone 14 is running on iOS 18.1 beta and just does not work with this key. Either a bug in iOS, or something needs to be fixed on the passkey-side, but they have been made aware. I will update this once iOS 18.1 is stable so that I can re-test.

Presentation The Thetis Pro-C FIDO2 Security Key Passkey Device is presented in a small branded cardboard box with a retail loop for a wire rack. Inside the box is a small cardboard tray (well done for the ecology consideration) containing the security key device itself and a small fold out user manual that also acts as a quick start instruction manual. First Impressions Taking the security key from the packaging and looking it over, it is a very small profile at 48 x 16 x 10mm and in the form of a flip out from a 360° cover, the cover being branded at the top which also has the illuminated touch button and having a QR code and details plus serial number on the bottom, a loop for a strap is also on the cover. The security key feels quite robust and is solidly built, and the USB C presentation is an obvious sign it was built recently for modern devices – reinforced by the fact it also supports NFC. Day To Day Use Unfortunately, despite the title stating “Thetis Pro-C FIDO2 Security Key Passkey Device with USB C & NFC, TOTP/HOTP Authenticator APP, FIDO 2.0 Two Factor Authentication 2FA MFA, Works with Windows/macOS/Linux/Gmail/Facebook/Dropbox/GitHub” and my being a Linux user on desktop and laptop, I could find no support or means of getting this device to work natively. Indeed there does appear to be some support if the supporting software is run in a ‘Firedrake’ virtual environment but I could not get this to install and work under Linux, and the download section of the Thetis website mentions Chrome, iOS, and Android – only one of which I use Android and that is on occasion. Summing Up This looks and feels like a well made, robust security tool for MFA etc but sadly does not support my environment so I cannot comment on its working as a passkey without such support and perhaps Linux should be removed from the title as it is misleading.

Funciona como descrito.

I am not affiliated with the company and my review is based on my own experience: The Thetis Pro-C FIDO2 security key has impressed me. The construction feels solid and well-built; actually more sturdy than my YubiKey 5C. Setup was straightforward, and it works flawlessly with my Linux system. I use it not just for login, but also to input my sudo password in the terminal, and even as a trigger to lock the computer when removed, which works perfectly. It’s also a great tool for encrypting and decrypting a LUKS-encrypted Linux hard drive, making the system both safe and easy to use without compromising security. Just make sure you keep a backup security key, in case something goes wrong. On Linux, the key can be used for several additional security tasks. It works well with SSH for passwordless login using hardware-backed authentication, can integrate with PAM modules for system-wide authentication, and can be used with GPG for signing and encrypting emails or files. It also supports browser-based FIDO2/WebAuthn logins, making it useful for securing accounts like Google, Amazon, and others. I haven’t been able to test Windows Hello login as I don’t use it, but it works perfectly on macOS too. It also performs reliably on my phone, which adds to its flexibility. The specifications are strong and everything functions as expected. The only thing I’d like to see in the future is firmware update support, but honestly, as it is now, it’s already a brilliant and dependable tool.

Ótimo chegou como combinado

I've been using the Thetis Pro-C FIDO2 key for a while now, primarily for basic two-factor authentication, and I'm quite satisfied with its performance. While I haven't explored all of its advanced features like TOTP/HOTP, everything I need it for works flawlessly. I use the Thetis Pro-C alongside a Yubico key, and I honestly can't tell the difference in speed or basic functionality. Both keys perform equally well in securing my accounts. This makes the Thetis Pro-C an excellent value proposition, offering comparable performance to more expensive brands at a more affordable price point. Pros: - Reliable FIDO2 performance - Comparable speed and functionality to Yubico keys - Excellent value for money Cons: - None at the moment * I haven't tested all advanced features! Overall: If you're looking for a reliable and affordable FIDO2 security key for basic two-factor authentication, the Thetis Pro-C is a great option. It offers solid performance and is a great alternative to more expensive brands. *** Top tip for those who say NFC doesn't work: *** The protective bracket that the key rotates in is made of metal (aluminum), which blocks the NFC chip. You must therefore unfold the key before you can scan it. This is a bit annoying at times, but on the other hand, it offers an extra layer of security.

I’ve been trying out the Thetis Pro-C FIDO2 Security Key, and my initial experience has been positive. Setup with USB-C and NFC worked smoothly, and the device responded consistently during my authentication tests. I also appreciate that it supports TOTP/HOTP, which gives me more flexibility across different accounts. The first thing I noticed was the build quality. In my opinion, the design feels more refined and substantial compared to some other security keys I’ve used. The metal housing gives it a more premium feel in the hand, and the overall fit and finish look thoughtfully put together. The LED indicator is subtle and blends well with the design—nothing flashy, but it has a cleaner and more modern appearance to me. The device also feels secure on a keychain without being bulky. NFC worked reliably during my early tests, and tapping into mobile authentication felt intuitive. As with any security device, I’ll continue testing it over time, but my first impressions are that it delivers a good balance of durability, aesthetic appeal, and functionality. So far, the Thetis Pro-C strikes me as a solid choice if you want a security key that not only works well but also feels well-made. I’ll update my thoughts if anything noteworthy comes up with longer use.