Design Of Embedded Access Control System Based On RFID

With the increasing of social personnel flow, security products also gradually enter intopeople’s lives.As the support of industry, the entrance guard system, as the pillar projects in thesecurity industry, is widely favored particularly by the society.The entrance guard system hasused a variety of application technology, such as voice recognition, fingerprint recognition, facerecognition which are new, but have low stability.The most common product is smart cardentrance guard system.But if the smart card is easy to copy, the entrance guard system wouldexist in the name only. In addition,network hacking and phone-tapping emerges in endlessly.Once the data is likely to be stolen which are needed to be spread through the media.This paper introduces the concept of entrance guard system, domestic and foreign researchpresent situation.This paper makes a detailed analysis of the needs in the embedded accesscontrol system based on RFID.Choosing the Cortex-M3processor and MF RC522radiofrequency card read chip which have good performance and low price design the access cardreader.Smart card uses the CPU card which is produced by Beijing datang smart card companyand the Mifare card which is produced by NXP company. In the hardware aspects,the systemrealized the MF RC522radio frequency card read module design、controller and card readmodule SPI communication、reading and writing the CPU card and Mifare card.Software usingJAVA and SQLServer database programming to realize PC software system, used to recordpersonnel flow situation.In the hardware aspects,the system can read and write the CPU card and Mifarecard.According to the two weaknesses in access control system,which are low confidentiality ininformation transmission and card information easily to be copied, the paper uses asymmetricRSA security algorithm to solve the above two safety problem and enhance the security of thetraditional entrance guard system, which is one of the innovative point of this paper..To ensurethe security of the data,the RSA algorithm is used to ensure the information safety among thecard reader、PC machine and CPU card.This design realized the high security entrance guardsystem.Finally, the experiments show that the RSA algorithm and RSA digital signature havegreatly improved the security on the entrance guard system.