USB Watchdog Device for Dynamic Peripheral Connection Security

The patent introduces an intermediary authorization system that sits between the USB device and the host system. This intermediary layer intercepts device connection events, verifies authorization tokens, and mediates permission granting. The intermediary prevents malicious devices from directly communicating with the host system, thereby maintaining ease of operation for legitimate devices while blocking security threats.

The patent implements preliminary authorization verification before granting full system access. When a USB device connects, the system first performs preliminary checks including device identification, token validation, and permission assessment before allowing the device to operate. This preliminary action prevents unauthorized devices from establishing harmful connections while maintaining smooth operation for authorized devices.

The patent implements a feedback mechanism where the system verifies device claims through multiple channels. When a device identifies itself as a specific type (e.g., keyboard, storage), the system provides feedback by requesting verification tokens or performing consistency checks. The device must prove its identity through cryptographic verification or behavioral validation, ensuring that self-identification is accurate and trustworthy while maintaining system adaptability.

The patent applies preliminary anti-action by preemptively validating device identities before granting permissions. Instead of trusting device self-identification, the system actively verifies claims through authorization tokens, digital signatures, or challenge-response protocols. This preliminary verification prevents deception by malicious devices while allowing legitimate devices to operate with appropriate permissions.