Chip decryption
1.Disassembly
Microcontroller disassembly is to read out the BIN file or HEX file from the microcontroller and decompile it into an assembly language that the engineer can understand. This is a very professional technology, the disassembly needs to be 100% accurate, if there is a byte error, then the disassembly file is meaningless, the disassembly file must be understandable to the engineer, which requires the engineer to be very proficient in the series of microcontrollers and to have a good understanding of assembly language, reverse thinking, electronics, etc. This requires the engineer to be very proficient in the series of microcontrollers and to have very solid skills in assembly language, reverse thinking, electronics, etc. In addition, we have written our own disassembly tool, which not only makes the disassembly file 100% correct, but also automatically analyzes and segments the program according to the subroutine call relationships and jump instructions. The disassembled file will be imported into the compiler environment and compiled, and then the generated HEX will be compared with the original BIN file before disassembly to ensure that the disassembled code is completely correct.
- Modifying functions
We have experienced reverse engineering team to help you solve various problems, such as removing soft encryption, removing ID encryption, removing external encryption chip, modifying time limit, modifying number of times limit, modifying interface LOGO, modifying machine serial number, adding new functions. Modifying or adding new functions in the case of BIN file and HEX file is a very technical thing, which requires engineers to understand the disassembled code completely, which is not an ordinary engineer can do, we have the ability to add new functions on top of the original one and not affect the original function, which is very important for customers’ product upgrade, and can make your decrypted product This is very important for customers to upgrade their products, so that your decrypted products can be better than blue.
- Remove ID encryption
Nowadays, electronic products are more and more strict in soft encryption, and there are all kinds of encryption methods, among which ID encryption is the most common, many microcontrollers have a global unique ID number, such as the popular STM32, but there is no shield that can’t be pierced, and there is no invulnerable spear, experience and strength is the root. We are confident that we are one of the very few companies in the industry with such capability.
4.Removing other soft encryption
In addition to ID encryption, there are other kinds of encryption methods on the market, as well as various special encryption chips. But the idea of encryption is still the same, that is, to check the legitimacy of the product. Nowadays, the more popular encryption algorithms are: SHA-1 information digest encryption algorithm; DES symmetric encryption algorithm; AES advanced encryption algorithm; RSA public key encryption algorithm and so on. DES encryption module is integrated in many encryption chips. We are proficient in the encryption ideas of the above popular encryption algorithms and have unique solutions for various encryption schemes, including the most difficult encryption method of transplanting key algorithms to smart card chips nowadays.
- Modify device serial number
If the decrypted product shows the original serial number, it also involves a problem of infringement. Many products also bind the serial number to the machine function, and even the machine function is not normal after modifying the serial number, and many customers often cannot bring their products to the market for a long time because of this problem. We have solved many similar problems for our customers, and have accumulated rich experience in this area.
