Chip probe directly read if the decryption of the use of chip probe directly read the chip inside the flash or rom, the above method is not guaranteed, and this level is also very professional, the general decryptors do not have this condition.
The first method requires that the chip be bound to a test fixture and operated with the help of a binding station. The second method requires personal wisdom and patience in addition to having certain knowledge and necessary skills of the attacker, but it is relatively easy to operate, and completely home in the operation.
Microcontrollers, also called chips, contain programmes. The programme in the chip is encrypted and generally unreadable. But it can be cracked. With encryption comes decryption. If you want to decrypt the MCU in your hand, just type "chip decryption" in Baidu to find a company that specialises in modchip.
Microcontroller decryption is a very loaded thing, first of all, you need to oxidise the surface layer of the chip package, and use professional equipment to decrypt. The first is to completely dissolve off the chip package, exposing the metal connecting wires. It is necessary to bind the chip to the test fixture and operate it with the help of a binding table. The second is to remove only the plastic package on top of the silicon core.
FF bytes, the inserted bytes are able to execute the instruction to send the on-chip programme to the off-chip, and then intercepted with the decryption device, so that the programme inside the chip is decrypted and finished.
Microcontroller decryption is simply to erase the encryption lock positioning within the microcontroller chip. Due to the AT89C series of microcontroller erase operation timing design on the unreasonable. So that before erasing the program in the chip first erase the encryption lock positioning to become possible.
FIB modification A lot of electricians have PCB cutting experience, microcontroller crack is the same, the chip is opened, with an ion beam to the protection of the logic is destroyed , while keeping the other circuits unchanged, and then read out with a standard burner. The most troublesome part of this is to find the protection logic circuit inside the IC.
Bootloader encryption: The STM32 MCU can protect the Bootloader program by setting the encryption option to prevent malicious code or unauthorised programs from overwriting the Bootloader.Flash encryption: By encrypting the Flash, you can protect the security of the code.The STM32 MCU provides both hardware and software encryption. software encryption.
The attacker took advantage of the loophole in the design of the timing of the erase operation of this series of microcontrollers, and used a self-programmed procedure to stop the next step of erasing the data of the on-chip program memory after erasing the encrypted lock locus, so that the encrypted microcontroller becomes an unencrypted one, and then used the programmer to read out the on-chip program.
1, the first is to completely dissolve off the chip package, exposing the metal connecting lines. It is necessary to bind the chip to the test fixture, with the help of the binding table to operate. The second is to remove only the plastic package on top of the silicon core.
2. The first method requires binding the chip to a test fixture and operating it with the help of a binding station. The second method requires personal wisdom and patience in addition to having certain knowledge and necessary skills of the attacker, but it is relatively easy to operate.
3. The first method requires the chip to be bound to the test fixture and operated with the help of a binding station. The second method requires personal wisdom and patience in addition to having a certain knowledge of the attacker and the necessary skills, but it is relatively easy to operate, completely home in the operation.
4, the use of high-grade programmers, burn part of the internal pins, specifically how to burn, you can refer to: microcontroller pin burning method and crack.
Chip probe directly read if the decryption of the use of chip probe directly read the chip inside the flash or rom, the above method is not guaranteed, and this level is also very professional, the general decryption of people do not have this condition.
Chips and circuit boards are closely embraced, and the soldering line is like a red thread holding their hearts. This method is simple and practical, but you need to pay attention to the quality of the soldering, otherwise it is easy to "break up" the situation. This is the most convenient way to plug and unplug this method, which is suitable for occasions when you need to change the "object" or reconfigure it frequently.
In fact, the best way to prevent fraud is to go directly to their company to see if there is any decryption equipment. If they have it, it's real, if they don't, it's not. No matter how far away, if you do decryption for the first time, I suggest you'd better go to the other company to have a look. If it is real, we can have a long term cooperation in the future.
Microcontroller decryption, there are mainly the following methods Vulnerability cracking Early years of Atmel's a Flash chip has a bug, that is, when the chip is erased, it will first erase the protection bit and then erase the content . So the cracking method came, erase the time, accurate timing, power failure, so the protection is removed, the content can also be read out.
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1, the current FPGA chip decryption methods are mainly as follows: 1) software attacks the technology usually use the processor communication interface and the use of protocols, encryption algorithms, or these algorithms in the security holes to carry out attacks.
2, chip decryption is also called microcontroller decryption, microcontroller crack, chip crack, IC decryption, FPGA decryption is a class of chip decryption. In order to prevent unauthorised access or copying of the in-computer program of a microcontroller, most microcontrollers come with a cryptolocker positioning or encryption bytes to protect the in-computer program.
3, the use of FPGAs to design ASIC circuits (Application Specific Integrated Circuits), the user does not need to invest in the production of the chip, you can get a suitable chip. 2) FPGAs can be done in other fully customised or semi-customised ASIC circuits in the pilot prototypes. 3) FPGAs have a wealth of internal flip-flops and I / O pins.
4, FPGA (Field-Programmable Gate Array), that is, field-programmable gate array, it is in the PAL, GAL, CPLD and other programmable devices based on the further development of the product.
5. When powering up, the FPGA chip reads the data in the EPROM into the on-chip programming RAM, and after the configuration is complete, the FPGA enters the working state. After power down, the FPGA is restored to a white chip, the internal logic relationship disappears, therefore, the FPGA can be used repeatedly.FPGA programming does not require a special FPGA programmer, only a general-purpose EPROM, PROM programmer can be used.
2, microcontroller decryption is a very loaded thing, first of all, you need to oxidise the surface layer of the chip's package and decrypt it with professional equipment. The first is to completely dissolve off the chip package, exposing the metal connecting lines. It is necessary to bind the chip to the test fixture and operate it with the help of a binding table. The second is to remove only the plastic package on top of the silicon core.
3, the chip will be added to the chip's programme chip protection procedures, EMXXX such as pin 2 voltage input will be cleared of all the contents of the chip ... ; 6: It is best to use a bare chip for the product; 7: Fuse some of the ports with high current....
4, the attacker took advantage of the series of microcontroller erase operation timing design loopholes, the use of self-programming procedures in the erase encryption lock positioning, stop the next step in the erasure of the on-chip program memory data, so that the encrypted microcontroller into the unencrypted microcomputer, and then use the programmer to read out the on-chip program.
5, the process is generally carried out in very dry conditions, because the presence of water may erode the exposed aluminium wire connections (which may cause decryption failure). The chip is then first cleaned with acetone in an ultrasonic bath to remove residual nitric acid and soaked.