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🔑 Unlock elite-level security with the YubiKey 5Ci — your digital fortress on the go!
The Yubico YubiKey 5Ci is a FIDO-certified two-factor authentication key featuring dual Lightning and USB-C connectors, designed for seamless, hardware-based security across Android, PC, and iPhone devices. Engineered for durability and offline use, it supports multiple authentication protocols and is compatible with hundreds of popular services, ensuring robust protection for your online accounts without relying on passwords alone.

















| ASIN | B07WGJ1DNJ |
| Best Sellers Rank | 755 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 4 in USB Gadgets |
| Box Contents | 1 product |
| Brand | Yubico |
| Brand Name | Yubico |
| Colour | Black |
| Compatible Devices | Smartphone, PC, iPhone |
| Connectivity technology | USB |
| Country of Origin | Sweden |
| Customer Reviews | 4.5 out of 5 stars 2,245 Reviews |
| Flash Memory Type | NAND |
| Global Trade Identification Number | 05060408461969 |
| Hardware Connectivity Technology | Lightning, USB Type C |
| Hardware Interface | USB |
| Hardware interface | USB |
| Item Weight | 3 Grams |
| Manufacturer | Yubico |
| Manufacturer Contact Information | Yubico AB, Gävlegatan 22, 113 30 Stockholm, Sweden +46 8 411 3000 |
| Manufacturer Part Number | Y-291 |
| Model Name | YubiKey 5Ci |
| Model Number | Y-291 |
| Model name | YubiKey 5Ci |
| Network Connectivity Technology | USB |
| Product Features | dual connectors for Lighting and USB-C ports |
| Product Warranty | 2 year manufacturer |
| Special feature | dual connectors for Lighting and USB-C ports |
| Unit Count | 1.0 count |
B**I
All pass in on iPhone 15
iOS recognize it immediately, application is fast quick simple
K**T
Secure your online life
A must have for securing your digital life. Not the easiest to get set up, but one email to yubikey customer service and I was all set. Recommended for anyone who cares about their online security.
P**J
A great product.
These days it's the basis. I have a few of these keys, and I can't imagine security without them. 2FA yes but only offline! No SMS, no passkey on a device we don't control, or in the cloud etc. No intermediaries, i.e. “we want to have copies just in case, for your safety” ha ha of course. It's only safe outside the network. Login, password, that can be intercepted, but a key that's in your pocket is impossible. And that element that really protects you.
N**N
Super!
Easy to set up. Adds another layer of protection!
D**O
The security key for the iPhone
It provides what I was looking for, extra layer of security.
C**W
SECURE!
GOOD AND SIMPLE!
D**N
Lightening broke within 2 weeks, case went after 3, x2. Too fragile compared with Yubikey 5NFC
Lightening connector snapped off within 1 week on two separate devices. Purchased second as time-critical, same thing happened within a week. One of the remaining USB-C connectors died after 8 months leaving a useless brick. Order continues to work albeit without casing as this fell off within 2 months of purchase. Good principle but hardware/casing implementation not fit fur purpose. To think they meant to be "IP68 rated: dust tight and water submersible, I'm not sure I would be plugging one of these into mains electricity if it got wet! May have lasted if kept in bubble wrap in and never moved, but it’s designed to plug into an iPhone and be carried on keys. Actually experience if of a fragile device needing to be in a hardened box not a keyring. Look at the two sorry items compared to the Yubikey 5 purchased same time. Caveat Emptor!
A**R
Caveat Emptor
Works on a pc usb c but every company I tried to use it with connected to the iPhone firewire does not allow you to use it as company policy apart from a few password manager apps and you only need one of them.
E**D
Very good
Very good
R**Y
The Ultimate Security Solution for iPhone & Mac Users
The Yubico YubiKey 5Ci ease of use is exceptional, with a simple plug-in Lightning connector into your iPhone or iPad, or use the USB-C end for your Mac, and authentication happens instantly with a simple touch. There's no complicated setup, no batteries to worry about, and no software to constantly update. The functionality is comprehensive and impressive, supporting multi-factor authentication (MFA) across hundreds of services: Google, Microsoft, Dropbox, Facebook, password managers like 1Password and LastPass, and countless enterprise applications. It works seamlessly with modern passkey technology, making passwordless login a reality while providing hardware-level security that's virtually impossible to phish or hack. The value for money is outstanding when you consider the protection it provides. This single key replaces vulnerable SMS codes and app-based authenticators with military-grade security that protects your most sensitive accounts from breaches, identity theft, and unauthorized access. The speed is remarkable; authentication happens in under a second with a simple touch, making secure login faster than typing passwords or waiting for SMS codes. Durability is where the YubiKey truly shines. It’s built like a tank with a rugged design that's waterproof, crush-resistant, and has no moving parts or batteries to fail, meaning it will last for years of daily use. The connectivity flexibility is brilliant with dual connectors (Lightning for iOS devices and USB-C for modern Macs) built into one compact key, eliminating the need for adapters or multiple keys for different devices. Whether you're securing personal accounts or protecting business data, the YubiKey 5Ci delivers enterprise-grade security in an incredibly user-friendly package that works flawlessly across your Apple ecosystem. For anyone serious about protecting their digital life, this is an investment that pays for itself the moment it prevents a single account breach. Highly recommended!
R**A
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حلووو كتيرررر .. شكررراً كتيرررر ..
T**S
🔐 Maximale, digitale Sicherheit für deine Konten ! 🔐
Ich kann den Yubico YubiKey 5Ci – Multi-Faktor-Authentifizierung (MFA) Sicherheitsschlüssel wirklich jedem empfehlen, der seine Online-Konten und persönlichen Daten ernsthaft schützen möchte. In einer Zeit, in der Cyberangriffe, Phishing und Datenlecks an der Tagesordnung sind, ist dieser kleine Schlüssel ein echter Gamechanger. Der erste Eindruck: Premium-Qualität und robuste Verarbeitung. Der YubiKey 5Ci fühlt sich stabil an, liegt gut in der Hand und vermittelt sofort Vertrauen. Das Einrichten ist überraschend einfach, und sobald er einmal konfiguriert ist, läuft alles reibungslos, schnell und zuverlässig. 💡 Wichtiger Hinweis für Apple-Nutzer: Auf dem iPhone lässt sich der YubiKey 5Ci nur einrichten, wenn man zwei Schlüssel hat. Einer dient als Hauptschlüssel, der zweite als Backup – ideal, falls man den ersten verliert oder er beschädigt wird. Meinen zweiten Schlüssel habe ich sicher aufbewahrt, sodass ich jederzeit Zugriff habe, selbst in Notfällen. Das gibt ein beruhigendes Sicherheitsgefühl, das unbezahlbar ist. Was macht den YubiKey 5Ci so besonders: Maximale Sicherheit: Unterstützt alle modernen Authentifizierungsstandards wie FIDO2, OTP und Smart Card. Ideal für E-Mail, Cloud-Dienste, soziale Netzwerke, Finanz-Accounts und Unternehmensanwendungen. Sofortige und zuverlässige Nutzung: Einfach einstecken oder auf das Gerät tippen, und die Authentifizierung erfolgt sofort – kein Warten, kein kompliziertes Setup bei jeder Anmeldung. Universelle Kompatibilität: Funktioniert auf Mac, Windows, Android und iOS (unter Beachtung der Zwei-Schlüssel-Regel). So bist du überall geschützt, egal welches Gerät du nutzt. Langfristige Investition: Ein kleiner Schlüssel, der langfristig deine digitale Sicherheit garantiert. Er ersetzt Passwörter und schützt vor Phishing und Kontoübernahmen. Für mich persönlich ist der YubiKey 5Ci mehr als nur ein Gadget – es ist ein beruhigendes Sicherheitsnetz, das ich nie mehr missen möchte. Ich fühle mich viel sicherer bei Online-Banking, Cloud-Diensten und allen sensiblen Accounts. 💯 Fazit: Wer ernsthaft seine Daten schützen möchte, sollte hier nicht sparen und sofort zugreifen. Der YubiKey 5Ci ist zuverlässig, schnell, universell einsetzbar und die beste Möglichkeit, die eigenen Konten wirklich abzusichern. Sicherheit ist kein Luxus 🔐 und mit diesem kleinen Schlüssel wird sie unglaublich einfach. 5 🌟 und eine klare Kaufempfehlung für jeden, der digitale Sicherheit ernst nimmt!
H**R
Great for security
It is my first time using. Yubico key but the configuration is simple and it works with all platform’s that require multi factor authentication. It works for apple devices and usb c devices it’s small which is great for keeping with you on a keychain but I would suggest getting 2 in case one gets lost. Great product.{edited}
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