The YubiKey is a hardware authentication device that provides secure access to computers, networks, and online services through various protocols including one-time passwords, Universal 2nd Factor, FIDO2, and smart card functionalities. It supports multiple authentication methods, including public-key cryptography and passkey-based passwordless authentication, while storing cryptographic keys securely to prevent exposure. The device is durable, water-resistant, and crush-resistant, with no battery required, and connects via USB, NFC, or other interfaces. It is manufactured in the USA or Sweden and is compatible with both legacy and modern applications, offering phishing-resistant multi-factor authentication and passwordless login capabilities.
