Yubico - YubiKey 5Ci - Multi-Factor authentication (MFA) Security Key and passkey for iPhone/Android/PC, Dual connectors for Lighting/USB-C, FIDO Certified

I am very pleased with the Yubico YubiKey 5Ci. Shipping was prompt, and the security key arrived well-packaged and protected, with no signs of damage. The dual-connector design—featuring both USB-C and Lightning plugs—was exactly as advertised and ready for immediate setup. In terms of product quality, this YubiKey feels solid and reliable. The build quality gives confidence that it will withstand daily carry on a keychain, and the connectors seat securely into devices without wiggle or looseness. Setting it up with my accounts was straightforward; the configuration steps were clear and compatible with the MFA options in most services I use. Functionally, the key enhances security through hardware-based authentication rather than relying solely on passwords or SMS codes. It supports modern authentication standards such as FIDO2/WebAuthn and U2F, providing a practical second factor for logging into email, cloud services, password managers, and other online accounts that support security keys. The dual Lightning and USB-C connectors make it especially useful for iPhone users and other Apple devices that lack conventional USB ports. Yubico +1 From a value perspective, this security key offers strong protection at a reasonable cost compared with subscription-based alternatives or more complex enterprise solutions. Its broad platform compatibility—covering iOS, macOS, Windows, Linux, and many web services—adds versatility. While not every app supports hardware keys yet, the ecosystem continues to expand, and the YubiKey remains a robust, future-oriented investment in account security. Overall, this is a well-made, dependable MFA solution that combines convenience with significant security benefits, and I would confidently recommend it.

I’ve been using the YubiKey 5C for the past three months across my MacBook, Windows PC, Android phone, and even my newer iPhone (via USB‑C). Here’s why it deserves a top‑tier rating: Design & Build The key feels solid—machined aluminum with a matte finish that resists fingerprints. Its compact, key‑shaped profile slides onto a regular keyring, so I never forget it. No moving parts mean it’s practically indestructible. Setup & Compatibility Out‑of‑the‑box, the YubiKey announces itself as a security key. A quick “insert → tap” sequence registers it with any FIDO U2F/FIDO2‑compatible service (Google, GitHub, Microsoft, Dropbox, etc.). It works flawlessly on macOS, Windows, Linux, Android, and iOS (USB‑C iPhone). No extra drivers or software are required. Security Because the private keys are generated and stored inside the device, they never leave the YubiKey—even if the host machine is compromised. This hardware isolation blocks phishing, man‑in‑the‑middle attacks, and credential stuffing. The built‑in passkey support also enables true password‑less logins with a single tap. Everyday Use Logging in is a breeze: plug the key into the USB‑C port, tap the metal contact, and you’re authenticated. I’ve used it for everything from my primary Gmail account to SSH access on remote servers. The only hiccup was occasionally forgetting the key during a quick coffee run—solved by keeping a backup YubiKey on a separate keyring. The YubiKey 5C delivers enterprise‑grade security with consumer‑friendly simplicity. It eliminates passwords, thwarts phishing, and integrates seamlessly into any modern workflow. At its price point (~$45‑$55), it’s an investment that pays for itself the moment it prevents a single account breach. I highly recommend it to anyone serious about protecting their digital life.

Since I work in IT, let me just say one thing. After installing this for a few users, together with our ani-virus it has prevented phishing attacks 100%. We plan to provide this on more users. I will be listing things I like about the key and some things I dislike/recommendations in hopes that this will help you make a decision. Overall, I highly recommend this key and wish I would have gotten it sooner. Likes: - Made to stay in a laptop. (Do not loose the laptop) - It's easy to configure and really secure. - Small, discrete and easy to cary around. - Made in USA and Sweden. - If you have security concerns with Google or other companies. - it is not a google product, thus they will not have access. - It works with most sites and if configured properly can be used to sign-in to windows, mac or your network. YouTube will have several tutorials on how to do this. - Compared to RSA security keys, you get this at a bargain. - It's a consumer version so it is not overly complicated. - There are several security/authentication methods you may use. But, the simplest one is using 2FA (Two Factor Authentication). You can use this without giving your phone number or answering security questions (which we forget). Dislikes/Recommendations: - Not every site supports yubikey - There are additional software used to manage but takes a while before you can understand what these can do or how to use it properly. - Made for a laptop so it may be a bit difficult to pull it out. It's basically made to be kept in the laptop. 'Just don't loose the laptop. You need to attach a string or a keychain so you can pull it out easier from the usb slot. - From time to time you need to remove the key and re-insert it into the USB slot. There are also 2 points you need to consider. * Before purchasing the key, make sure that the site you will be using it supports this. Here is a list of sites which supports the key. The list keep growing https://www.yubico.com/works-with-yubikey/catalog/ * You need to purchase 2 keys. Same a a physical door key, if you loose one, you have a duplicate. It will be more difficult verifying your information if you loose a key without a duplicate.

Chegou bem, lacre intacto d chave verifica. Está tudo funcionando perfeitamente

小さくてずっと付けていられます。ちょっと高いけど

El producto llegó a tiempo, bien empacado, y el producto funciona a la perfección , yo se que está especificado, pero lo único que le falta para ser perfecto es que tenga para conectarse al móvil por bluetooth. Pero a pesar d e eso, muy buen producto.

Perfecto.

Super small, super secure. This key stays put in your device for effortless 2FA. Works with tons of services, including Google and Microsoft. Multiple protocols for advanced security. No batteries, just plug and tap to authenticate. Ultra-durable: water & dust resistant, crushproof. Peace of mind knowing phishing attacks are a thing of the past. Protects your accounts wherever you go. Easy to set up, even for tech newbies. A small investment for a giant leap in security. Highly Recommend to Cloud User.