Because micro probing equipment is accessible and easy to use, Microchip's CryptoAuthentication™ is designed to thwart any attempt to retrieve information from the chip. Unlike competitors’ devices, such as the one seen here, the ATSHA204 has no probe points or test pads. The EEPROM in the ATSHA204 is obfuscated and encrypted to safeguard against deprocessing of the chip to obtain secrets. The clock and the supply voltage of the device are internally generated, preventing any direct attack on these signals. And with no identifiable marks on the die or package, the ATSHA204 provides security at every level.