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these projects are still in the early stages and there is no information on how the firmware update process works or how it can be manipulated. one of the main challenges in these projects is the firmware binary format that is not publicly documented and is proprietary. the firmware is stored in a file named "blob.bin" and it is expected to be executed by the operating system when the device boots. these files are generally stored in a proprietary format, such as the intel me format used in intel ssds. to date, there is no documented information about the format of the firmware or how it is executed. this makes it very difficult to analyze and reverse-engineer the firmware.while firmware is sometimes used synonymously with microcode, it's important to realize that a microcode update usually only involves a small amount of additional code that is burned into the device's silicon. it doesn't affect the way the operating system (os) works, so it doesn't need to be digitally signed and validated. but firmware refers to the software that lies at the heart of many devices, from the firmware controlling the operation of the cpu itself, to the firmware that controls the on-board peripherals, to the firmware that controls the way the device communicates over the network or interacts with the system's os.many companies claim that they've adopted strong security practices, such as by using cryptographic validation techniques that involve digitally signing the code and validating that signature. but even if they do, the firmware contains code that can be modified and repackaged. this makes firmware validation a much more complex process than just signing the code.
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