Research On Encryption Algorithm Of Anti-counterfeiting Label System Based On RFID

Radio Frequency Identification(RFID)technology is a kind of communications technology taking advantage of radio signals to identify specific targets and to read or write data.RFID system can identify object without the presence of mechanical or optical contact.This technology advantage makes the RFID technology not affected by bad weather and the influence of complicated field environment in the process of engineering practice.In addition,the tag is read quickly,small and reusable.These characteristics make RFID technology playing more and more important roles in people's life,social development and military security.However,as RFID technology becomes more and more widely available,the issue of RFID technology security is becoming more and more serious,and it restricts the development of RFID technology.Therefore,the research and development of more secure and reliable RFID intelligent terminals and systems have very important practical significance for the development and popularization of this technology.The main work of this article is to design and develop RFID anti-counterfeiting system and study the SM4 encryption algorithm for data encryption.The system is made up of anti-counterfeiting tags,interface equipment(card reader,distributor),and the top unit.The anti-counterfeiting tags take advantage of CPU card with a higher security level instead of traditional logical encryption card.The CPU card has card operating system(COS)with the function of file management,command identification and verification,card's protection.The interface device is an embedded system based on STM32F103VET6 microprocessor and the kernel with ARM-Cotex-M3.On the basis of porting the uC/OS-II operating system,writing the applications to implement the creation and reading of the tag's file.Both the distributor and the reader support the offline use,and the data is sent to the top unit to display the tag's information by the ZigBee wireless transmission module.When the user needs to modify the tag's information,the top unit sends the relevant commands and data to the distributor,and then changes the information stored in the card.On the basis of building anti-counterfeiting tags,hardware and software platform,the RFID anti-counterfeiting system integrates the local SM4 encryption algorithm,and makes detailed analysis of the algorithm.Furthermore,this paper puts forward the security improvement scheme of using channel transmission key to improve the algorithm,enhancing the security of this system further.