Local OTA Firmware Update via Remote Control Proxy

The patent introduces a remote control application as an intermediary device that mediates between the image provider and the embedded system. The remote control application receives encrypted firmware images from the image provider and delivers them to the embedded system through a local area network connection, bypassing the need for the embedded system to establish secure connections with the image provider directly. This resolves the contradiction by maintaining security through encryption while enabling update delivery through the intermediary's network connection.

The remote control application serves as a mediator that connects to the embedded system via local area network (such as Wi-Fi direct or hotspot) instead of requiring WAN connection. The intermediary device handles the communication with the image provider over WAN and delivers updates locally, enabling updates to be received even when the embedded system is isolated from the WAN or cannot establish secure connections directly.

The patent replaces the mechanical/physical access requirement with an electronic/digital solution. Instead of requiring physical connection through USB or other interfaces, the system uses wireless communication protocols (local area network connections) to transfer firmware updates. The encrypted images are delivered over the air through the remote control application, eliminating the need for physical access while maintaining security through encryption and authentication mechanisms.

The remote control application as an intermediary handles the authentication and connection management. The intermediary device maintains its own valid credentials with the image provider and uses these to establish connections for receiving updates. This separates the embedded system from direct authentication requirements, allowing updates to be received even when the embedded system's embedded credentials have expired, as the intermediary handles the authentication process.