Portable - Fit the YubiKey on a keyring and carry anywhere you go.Durable - Fiberglass reinforced bodies protect key from everyday life.Simple - Just insert into USB-C or Lightning port and tap the gold contact.Unified Solution - A key that works across desktops and mobile devices.Industry-First - Dual connector with support for USB-C and Lightning.It works with Google Chrome or any FIDO-compliant application on Windows, macOS or Linux and with applications that provide FIDO, FIDO2, or one-time-password (OTP) support and through Chrome, Firefox, or Edge browsers. The YubiKey 5Ci is FIDO and FIDO2 certified. Using the YubiKey, companies have seen zero successful phishing attempts.

Yubico pioneered the creation of the FIDO U2F and FIDO2 authentication protocols along with Google and Microsoft. Use the same asymmetric cryptography and strong security used by individuals at 9 of the top 10 technology companies.Once registered, each service will simply request you to insert and tap your YubiKey to gain access during login. Register easily with hundreds of services.A YubiKey makes it extremely difficult to gain access or steal your most important files, pictures, emails, and financial information. Protect your online accounts from phishing and account takeovers.Secure your login and protect your account with hundreds of services like LastPass, 1Password and others.The YubiKey 5Ci also delivers secure login to macOS, Android, Windows, ChromeOS and much more.

And no battery or network connectivity required, so the YubiKey 5Ci is always on and accessible for authentication. Register only once on any iOS device and get recognized on any other Apple device of your choice. Simply insert either connector to the device of your choice and experience YubiKey authentication that’s four times faster than typing in a One Time Passcode. With support for both the Lightning port and USB-C, all on one single multi-protocol device, the YubiKey 5Ci offers a unified secure authentication solution for modern devices supporting USB-C across Android, Linux, and Windows, as well as across all Apple devices such as Macs, iPhones and iPads. The YubiKey 5Ci combines hardware-based authentication and public key cryptography to eliminate account takeovers.

Yubico lightning