General
Degree of protection	IP68
Interface	USB-C
Function	NFC
Authentication standard	U2F
Technology	Public-Key Cryptography
Operation	without batteries
Construction type	without moving parts

The Yubico Security Key C NFC is a hardware-based authentication key used for secure login to online services. It supports the U2F and FIDO2 standards and enables strong single-factor authentication (passwordless), two-factor authentication (2FA), or multi-factor authentication (MFA). The device is designed for use with desktops, laptops, and mobile devices and provides reliable protection against account takeovers due to unauthorized access.

Applications

The Security Key C NFC is primarily used for authentication with online services that support U2F- or FIDO2-compatible login functions. This includes services from Google, Microsoft, Twitter, Facebook, and many other providers. Authentication occurs without additional software and without batteries, making the key easy and quick to integrate into daily use. It is suitable for use in private and professional environments where a high security standard is required.

Functions and Features in Detail

The device features a USB-C interface and NFC functionality, enabling use with computers equipped with USB ports as well as with mobile devices that support NFC. Authentication is based on public-key cryptography, with the private key stored within the device and not transmitted to external systems. This enhances security against phishing and man-in-the-middle attacks. The device is used by simply inserting it into a USB port or by touching the NFC area on a mobile device.

Technology Explained Simply

The Security Key C NFC uses the U2F (Universal 2nd Factor) and FIDO2 protocols, which were developed for secure, standardized authentication. U2F enables two-factor login, while FIDO2 forms the basis for modern passwordless authentication methods. Public-key cryptography ensures that each authentication attempt is unique and cannot be reused. The IP68 protection rating means the device is dust- and waterproof, suitable for outdoor use, and resistant to mechanical stress. The improved injection molding process ensures a robust construction without moving parts, increasing durability.

Compatibility and Accessories

The key is compatible with a wide range of services that support U2F or FIDO2 authentication. It can be connected to devices with a USB-C port or NFC functionality. No additional software is required, simplifying setup and use.

Installation and Mounting

Installation is performed by simply inserting the Security Key into the USB-C port of a computer or by touching the NFC area on a mobile device. No additional steps or tools are required. Authentication is automatically initiated once the key is detected. Setup is performed via the respective platform that supports the key and does not require special configuration.

Operational Advantages

The Security Key C NFC offers high security during authentication, as it requires no batteries and has no moving parts, reducing the likelihood of failure. The IP68 protection rating protects the device from dust and water, making it suitable for use in various environments. The combination of USB-C and NFC enables flexible use with different devices. Authentication is fast and reliable, without requiring additional software or external dependencies.