Intellectual property protection for embedded devices

With the popularization of embedded devices, manufacturers do not modify executable code for third-party reverse engineering to protect intellectual property rights. You can use a Data signature to sign a work image. Check the legitimacy of the image when executing the image. If the image has been tampered with, the device will be subjected to destructive operations if the signature is illegal after the hash operation. For example, mark a specific area of FLASH. Check the content of this region for each start. If it is marked as illegal, it will not be executed. The system enters the warning status and displays a warning message on the device. Turn it into a brick machine or disable some functions. For example, if you disable the modem, you cannot make a call.