FIDO U2F Security Key, Thetis [Aluminum Folding Design] Universal Two Factor Authentication USB (Type A) for Extra Protection in Windows/Linux/Mac OS, Gmail, Facebook, Dropbox, SalesForce, GitHub

I recently purchased the Thetis FIDO U2F Security Key (Aluminum Folding Design) to add a hardware-based second factor to my accounts, especially Bank of America. Right out of the box, the key’s compact 360° rotating aluminum cover impressed me with its sturdiness and portability. Setup on my Windows 10 PC was truly plug-and-play—no drivers or apps needed—and registration with Bank of America’s Security Center took less than two minutes. Since then, I’ve used it for both login verification and authorizing high-value transfers, eliminating the need for SMS codes and the associated delays. Overall, it delivers exactly the seamless, phishing-resistant protection I was looking for.The build quality feels premium. The aluminum alloy casing is far more durable than any plastic key I’ve tried, standing up to daily wear without scratches or dents. The cover swivels easily to expose the USB-A connector and snaps firmly back into place to shield it when not in use. It’s small enough to live on my keyring without adding bulk, and the metal construction also helps dissipate any heat during extended use. For anyone who wants a mix of style, durability, and portability in a security key, this design checks all the boxes.Integrating the key with Bank of America was just as painless. Inside the “Additional Security Features” section of the Security Center, I clicked “Add USB Security Key,” plugged in the Thetis device, tapped its button when prompted, and it registered immediately. From that point on, every login and transfer recipient addition required only a quick tap on the key—no more waiting for text messages or worrying about SIM-swap attacks. The bank’s site supports the FIDO U2F protocol natively, and all major browsers (Chrome, Firefox, Edge, Safari) detect the key automaticallyIn day-to-day use, response times have been instantaneous every single time. I’ve authenticated on Gmail, Facebook, Dropbox, GitHub, and Salesforce without a single misread or retry. The same key also works flawlessly on macOS, Ubuntu Linux, and even my Chromebook, provided the site supports U2F or FIDO2. I’ve kept alternative keys in my Bitwarden vault as backups, and community reports confirm that the folding design actually protects the metal contacts better than some premium brands’ plastic housingsBeyond convenience, the tangible tap requirement gives me confidence that unauthorized access is virtually impossible if my password is ever compromised. Unlike SMS or app-based codes, a hardware key can’t be intercepted or phished remotely, and the bank still offers SMS fallback only if you explicitly opt out of using a security key. For anyone handling sensitive financial transactions, this level of protection is well worth the modest investmentIn summary, the Thetis FIDO U2F Security Key delivers robust, hassle-free two-factor authentication at a budget-friendly price. Its premium aluminum build, flawless Bank of America integration, universal platform support, and strong phishing resistance make it an essential tool for securing my online accounts. I’m confident it will continue to perform reliably for years to come, and I highly recommend it to anyone seeking to upgrade from SMS codes or authenticator apps to a true hardware-based second factor

I'm an Internet Engineer, and I've been building infrastructure for media companies for nearly 25 years. I know firsthand that companies don't care about your data as much as they care about saving money, so protecting yourself is up to you.Google issued hardware keys like this one to all of their employees, and after doing so, they were immune to phishing attacks. If you want to be sure that the hackers behind the next data breach can't access your accounts even if they get your password, then a U2F key is the way to go.U2F keys activate the "something you have" of two-factor authentication, complementing the "something you know." There are a number of ways to deliver 2FA - authenticator apps with one-time passwords, text messages or emails with codes in them, RSA-style dongles with the six digits that change every minute, or a U2F key like this. The nice thing about a U2F key is that it _complements_ another form of 2FA. If you don't have your phone with you or left your RSA dongle at home, having a U2F key on your keychain means you can still access your accounts, and vice versa. You can even activate multiple U2F keys, whereas sites only allow a single OTP or authenticator app.Always have a backup for important things.I set it up with Dropbox and Google Apps, and it only took a moment. This key is small enough to go unnoticed on my keyring, and I like that it folds to protect the USB connector. I have another key from a different vendor that doesn't offer protection for the connector, and I'm concerned about how long it will last, flopping around in my pocket. The key from Thetis feels solid, and I'm glad that I bought it.How small is it? I've added a couple of pictures to show you how it looks with a USB-C adaptor in my Mac, a pair of AirPods, and a standard folding-style USB flash drive. It's tiny.Support for U2F is new, but as more sites recognize that they can protect their users by enabling support for it, it will become more prevalent. I recommend that you pick one of these up and activate it everywhere that you can.

There isn't much to say about a security key. Either it works... or it doesn't (and is thereby defective). There isn't any extra features to compare or specs to evaluate. That said, the key works and was cheaper than other offerings. Tested with Google and Twitter.I originally purchased it for extra security for logging into windows. However, it seems I did not complete my research thoroughly enough and as of the writing of this review Windows 10 does not support keys for login (even if it has an option for it in the settings). That is a flaw of Microsoft and not this key. It is, however, something to keep in mind if that is what you are looking for.Website login integration is (where supported) very easy though may require extra steps. That is, once again, a reflection of those particular sites and not the key.The key itself is built sturdy out of rigid plastic and some sort of metal sheath. When opened, the sheath softly (yet firmly) clicks into place and has a good feel. The button has a nice tactile click and it fits VERY SNUG in a USB port. Almost too snug for my liking but I suppose that is the price one pays for durability.I do wish the hole punch for placing on a keychain or lanyard was a touch bigger. Does not fit on my keychain. Also, when closed the sheath does not feel like it firmly clicks in place in the closed position like it does when opened. But other than that, it works which is all one can really ask from such a product.

been using this for a couple months. works good. does not use finger print (just a push button). many websites support security keys'...