False sensing attack
At present, the function of disrupting smart cards has evolved into a comparative method of attack. Thousands of hackers from amateur to very professional around the world use this method. Therefore, this type of false sensing attack (also known as a semi-invasive attack) has become the main target of security performance evaluation and verification of security controllers.
Controllable physical layer attack
The attacker may also manipulate the circuitry on the chip in a more direct manner, for example, by directly connecting the signal lines on the microcontroller with electrical devices to read the confidential data transmitted on the line or to note the attacker's own data. In the human chip.
The attacker also uses methods to obtain confidential data information (such as authentication codes), which is achieved by carefully observing various parameters while the chip is working. Using power analysis (SPA--simple power summer analysis. DPA--different power analysis. EMA--electromagnetic analysis) method, the attacker can extract information according to power consumption or electromagnetic radiation, because the type of operation and chip The data processed in the process varies, and the power consumption and radiation intensity vary.