A USB Security Key is a physical device used to enhance the security of your computer or online accounts by providing two-factor authentication (2FA). These keys are typically used to authenticate your identity when logging into services or systems, ensuring that access is granted only when the key is physically inserted into a USB port. Examples of USB security keys include devices like Yubikey, Thetis, Feitian, or other similar hardware tokens.

The USB Security Key Windows driver is the software that enables Windows to interact with the USB key, allowing it to be recognized and function correctly within the operating system for secure authentication. Without this driver, the system may not detect or work with the security key.