A software encryption and decryption method for a vehicle-mounted decoder

Abstract

The invention relates to a software encryption and decryption method for a vehicle-mounted decoder. The ID ciphertext generated by the encryption algorithm at the product end is written into the FLASH address designated by the MCU, and the ID ciphertext is converted into plaintext and sent to the activator end; After receiving the plaintext sent by the product side, the activator side obtains a ciphertext string from the encryption algorithm through the specified encryption key, and then the activator side sends the ciphertext to the product side. After the product side receives the ciphertext, the MCU Internal read and write protection operation. The invention realizes software encryption of vehicle-mounted decoder products without encryption chip, saves cost, greatly reduces security loopholes, has good encryption effect, is not easy to be cracked, and is very difficult to crack, effectively improves the reliability of vehicle-mounted decoder products, and can effectively It can prevent products from being illegally imitated and stolen, has good security performance, and can well meet the needs of practical applications.

Description

technical field [0001] The invention relates to a software encryption and decryption method of a vehicle-mounted decoder. Background technique [0002] In recent years, the automotive electronics industry has developed rapidly, and the replacement of cars is getting faster and faster. Correspondingly, in order to be able to adapt to new models, decoder manufacturers also need to quickly launch new products. The development of a decoder that adapts to new models often costs a lot. , The development cycle is long, if the product itself does not have the corresponding encryption technology, once the product falls into the hands of criminals, it is likely to be plagiarized, which will bring huge losses to the decoder developer. [0003] At present, product imitation is becoming more and more frequent. In the field of embedded applications, with the development of hacking technology and chip dissection technology in recent years, embedded systems are facing more and more attacks....

AI Technical Summary

Problems solved by technology

A good solution should be hardware plus software, but if hardware plus software is still used for comparison and certification, the security performance is still very low, and the chip cost is relatively high, and the price advantage of the developed products is relatively low and uncompetitive

This kind of encryption lock is too difficult to crack, and the security performance is too poor. Pirates can track the input and output data of the USB port through line tracing, find the password for authentication, and store the read data to complete the cracking.

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