The YubiKey combines hardware-based authentication and public key cryptography to eliminate account takeovers. Simply tap the YubiKey NEO to your NFC enabled device or insert into a USB-A slot and authenticate with a touch. YubiKey does not require a battery nor network connectivity so it is always on and accessible.
Have used YubiKey NEO and NANO for almost 2 years now. Reliable, consistent, and easy to integrate into your current environment
Pros:Easy to Use and Easy to Configure
Cons:none