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Yubikey REST API - Developers

The service provides two-factor authentication by combining a cloud-based one-time password (OTP) validation service with a USB plug-in, the Yubikey, that sends a time-variant, secure login code. Requests are processed through five frequently synchronized data centers with global coverage, so responses are not dependent on location. API methods support submission of an application's previously registered Yubikey code and return a one-time password for use in authenticating the user.