Study And Design Of Traffic One-card Based On Android And NFC Technology

As the integration process of urban public transport was deepened,smart card was more and more widely applied in public transport field,and it promoted the interconnection development of traffic one-card.NFC technology was a kind of short-range wireless communication technology and it was evolved from RFID technology.Due to its high security and fast connection speed,it had been widely applied in mobile phone and other hand-held equipments.This paper simulated the NFC Smartphone which was embedded security elements as a kind of non-contact smart card and did research on the basis of NFC technology.Additionally,it proposed a designs scheme of simulating smart card with NFC Smartphone.Firstly,this paper introduced the study status of NFC at home and abroad.With study and analysis for NFC technology and smart card technology,it took feasible analysis for the scheme of simulating smart card with NFC Smartphone from the technical perspective.Additionally,it summarized the functional characteristics of existed traffic one-card.With combination of the features of Android system,it completed a scheme design of simulating smart card with NFC Smartphone.Secondly,it studied the authentication mechanism and data encryption algorithm between smart card and reader.On such basis,it proposed a kind of Diffie-Hellman key exchange algorithm and DES algorithm-based mutual authentication mechanism.With combination of the sequence chart,it introduced the authentication process of the mechanism.Furthermore,it studied the data access principle of Android application to Applet,and completed a user information Applet and "NFC trigger" App design.Finally,it made realization for the key technological part of simulating smart card with NFC Smartphone,mainly including the realization of Applet,"NFC trigger" and data encryption module.With combination of related schematic diagrams and interface,it introduced the functions and realization processes of all functional modules.The scheme that simulating smart card with NFC Smartphone embedded with security elements had expanded the function of traffic one-card.On security authentication aspect,this paper adopted Diffie-Hellman key exchange algorithm innovatively.With encryption authentication by random keys and compared with encryption authentication by single key,it had improved the data security.