protect password from readout
Posted: Sun Apr 19, 2015 7:45 amIs there any chance to avoid that somebody getting physical access to the device can read the wifi password?
As the code itself needs to know how to read the password to get connected, it appears that the only real appropriate way would be to secure the code (or at least a small fraction of the code). Seems like either Espressif has implemented a way to do so and not yet exposed or the only chance is to use a separate MCU (maybe an ATtiny) to do so and somehow avoid that the password gets stored in flash by the SDK...
As the code itself needs to know how to read the password to get connected, it appears that the only real appropriate way would be to secure the code (or at least a small fraction of the code). Seems like either Espressif has implemented a way to do so and not yet exposed or the only chance is to use a separate MCU (maybe an ATtiny) to do so and somehow avoid that the password gets stored in flash by the SDK...