Design And Implementation Of The NFC Intelligent Band With Multiple Application

With the development of IT industry and science technology, It is presenting a wearable device craze at home and abroad. Nowadays,different forms of wearable devices has entered people’s life from all aspects. More and more wearable device types appear on the market .The main smart wearable devices include: intelligent glasses, intelligent,watch and intelligent helmet, intelligent band and intelligent buttons, etc.Currently intelligent band can occupy half of wearable equipment.Moreover with the coming in of ApplePay the NFC technology development is greatly promoted in the field of mobile payment. Most of the smart band at present is used for calculating steps ,such as xiaomi band or Huawei band.Besides above shuashua band combines NFC technology and step .The number of this type is small. In this background,this paper designed a model based on NFC technology can replace "smart card" at the same time and implemente it. Users can use different NFC cards under different scenarios.As an extension of the RFID technology, NFC technology is destined to has an inseparable relationship with mobile payments since the date of birth.The current mobile phones in the NFC chip can be modeled as a bank card, adn can complete communication between POS and payment.But there are many security hidden danger in the process of payment, such as eavesdropping, replay, forge entity, phishing, etc.So how to ensure the privacy of our users in the NFC trading process property safety is top priority.Based on the above two points, this paper made the following work:1. Learn the related theory of NFC technology (working mode,mobile payment solutions, etc.), BLE technology (BLE characteristics,the BLE protocol stack, etc.) and the JAVA card. And identified the adopted scheme in this paper, HCE (Host-Based-Card Emulation).2. Design and implement an intelligent band if NFC multiple application, in addition to caculating step and show time, a number of NFC applications also can be used at the same time to satisfy the user demand for the use of different NFC smart card under different scenarios.3. In view of the NFC can be eavesdropped, replayed ,using asymmetric encryption ECC with symmetric encryption AES way and with the combination of the digital signature technology, this paper design a set of authentication encryption security scheme and use and a NFC relay-attack device to authenticate encrypted band safety.