Cross-Account Voice Assistant Access via Biometric Trust

The patent introduces a cloud-based authentication server as an intermediary between the primary and secondary smart speaker devices. This server mediates the trust relationship by validating voice prints and managing authentication tokens, enabling cross-device access without requiring direct peer-to-peer communication or complex local configuration. The intermediary handles the complexity of security protocols centrally.

The patent replaces traditional mechanical authentication methods (physical presence at the designated device, manual pairing) with biometric voice print authentication. The voice print serves as a digital identifier that can be verified remotely through the cloud, eliminating the need for physical access to the primary device for authentication purposes.

The patent implements preliminary authentication actions where the user first provides voice print authentication at the secondary device to establish a trust relationship. Once authenticated, the system issues authentication tokens that enable subsequent access without repeated verification. This preliminary action reduces the burden on users during normal operation while maintaining security through initial verification.

The system incorporates feedback mechanisms where the cloud server continuously validates authentication tokens and monitors the trust relationship between devices. If suspicious activity is detected or the voice print verification fails, the system provides feedback by revoking access or requesting re-authentication, ensuring security while maintaining convenient operation during normal use.