Suggestions for solving single-chip cracking - Database & Sql Blog Articles

Single chip microcomputer STM32L151CCU6

1206RGB (single)

SMD aluminum electrolytic capacitor

0201 package SLP0603 ESD electrostatic diode 5V one-way ESD

Mobile phone crystal 3.2*2.5mm 3225 26M (26.000MHZ) 7.5PF 10PPM 20PPM 30PPM

In any case, in theory, an attacker can use enough of the investment and time to break through the above methods. Therefore, when using a single-chip microcomputer for encryption authentication or designing a system, the attacker's attack cost and time spent should be increased as much as possible. This is the basic principle that system designers should always keep in mind. In addition to this, you should also pay attention to the following points:
(1) Before selecting the encryption chip, it is necessary to fully investigate and understand the new progress of the single-chip cracking technology, including which ones have been confirmed to be crackable. Try not to use chips that can be cracked or the same series and the same model.
(2) Try not to use MCS51 series MCU, because the MCU has the highest popularity in China and is the most thoroughly studied.
(3) The original creator of the product generally has the characteristics of large output, so it is possible to use a relatively simple and unpopular single-chip microcomputer to increase the difficulty of purchasing by counterfeiters.
(4) Select a new technology, a new structure, a short time to market microcontroller, such as ATMEL AVR series microcontroller.
(5) Under the condition that the design cost is allowed, the smart card chip with hardware self-destruction function should be selected to effectively deal with physical attacks.
(6) If the conditions permit, two different types of single-chip microcomputers can be used for backup and mutual verification, thereby increasing the cost of cracking.
(7) Polish the chip model and other information or reprint other models to make a real mess.