Research On Distributed Access Control System Based On RFID And3G Wireless Communication

Access control system is an important component of security system. The system can’t onlycontrols the access privileges, but also supervises the staff attendance. With the rapid development ofscience and technology, traditional access control system can’t meet the requirement of highersecurity and larger management area. Then, a number of new types of access control systems hadappeared in recent years. Access control system based on RFID is one type of the new turned upaccess control systems, which is also the widely used type of the systems. But the security isn’t highenough and the management area is seriously restricted of this kind of system. The paper tries todesign a distributed access control system based on RFID and3G wireless communication withintroducing some new technologies to the access control system. The paper focuses on the researchand implementation of the terminal part in the access control system.According to the specific use requirements of the access control terminal, the paper selectsS3C6410-B expansion board as the main control panel of the access control terminal and selects ZTEAD38123G module as a basis communication module. Then, the paper builds the hardwarearchitecture of the terminal part with the power module, RFID reader module, system statusindication module. The paper designs the embedded operating system running on the hardwaresystem according to the hardware architecture. The paper focuses on the kernel’s file system, driver,application and service module configuration.According to the overall system solutions and practical functional requirements, the paperbuilds the overall architecture of the terminal control software and uses classic three-tier designmode to implement the terminal control software. Then, the paper designs the communicationprotocol of the access control system based on socket communication and defines thecommunication packet in the communication process. Based on the web services technologyprinciple, the paper proposes the method of use web service to achieve the system communication, and designs the service interface function.Access control system as a security system, security should be a serious considered componentof system design. Based on analysis of common attack types of RFID systems and the commonlyused RFID security protocols, the paper designs an improved RFID security protocol based onrandom Hash-Lock protocol and analysis its safety performance. To improve the transfer security，the paper uses high security DES symmetric encryption algorithm to encrypt the data transferredbetween the terminal and the server, and realizes the encryption process on the.NET CompactFramework Platform.Finally, the paper shows the integration test of the system’s hardware and software system.Above the overall software architecture of the terminal control software, the paper realizes the mainfunction including3G dial-up control, initialization, rigister, regular reporting and software upgrade.