The FIDO-key BIO USB-C is a biometric hardware security key designed for passwordless online authentication. It functions as either a standalone authentication method or a multi-factor authentication token. The device utilizes a standard USB-C connection and plug-and-play technology to operate across major operating systems, including Microsoft Windows, macOS, and Linux. It is built to store an infinite number of cryptographic keys and is housed within a durable, waterproof casing for the physical protection of credential data.