The YubiKey 5Ci combines hardware-based authentication and public key cryptography to eliminate account takeovers. 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. 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. Register only once on any iOS device and get recognized on any other Apple device of your choice. And no battery or network connectivity required, so the YubiKey 5Ci is always on and accessible for authentication. The YubiKey 5Ci also delivers secure login to macOS, Android, Windows, ChromeOS and much more.