Attack DSP IC Chip program memory to extract encrypted data from MCU memory, disable the tamper resistance system by Microcontroller unlocking;

Attack DSP IC Chip program memory to extract encrypted data from MCU memory, disable the tamper resistance system by Microcontroller unlocking

The acid is normally applied in small portions with a pipette into a pre-milled hole in a chip preheated to 50–70˚C (Figure 51). After 10–30 seconds the chip is sprayed with dry acetone from a washing bottle to remove the reaction products. This process has to be repeated several times until the die is sufficiently exposed. To speed up the process, the chip can be placed in a sand bath and the acid can be preheated in a glass beaker. see below picture:

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