Another possible brute force ic decryption when you are trying to Read IC Program, applicable to many semiconductor chips, is applying an external high voltage signal (normally twice the power supply) to the chip’s pins to find out whether one of them has any transaction like entering into a factory test or programming mode.
Another possible brute force ic decryption when you are trying to Read IC Program, applicable to many semiconductor chips, is applying an external high voltage signal (normally twice the power supply) to the chip’s pins to find out whether one of them has any transaction like entering into a factory test or programming mode
In fact, such pins can be easily found with a digital multimeter because they do not have a protection diode to the power supply line. Once sensitivity to a high voltage is found for any pin, MCU Cracker can try a systematic search on possible combinations of logic signals applied to other pins to figure out which of them are used for the test/programming mode and exploit this opportunity.