中图分类号： TN914；TP302.1 文献标识码： A DOI：10.16157/j.issn.0258-7998.211395 中文引用格式： 韩宇龙，肖青，柳耀勇，等. 基于区块链的物联网卡安全流转方法研究[J].电子技术应用，2021，47(12)：110-115. 英文引用格式： Han Yulong，Xiao Qing，Liu Yaoyong，et al. IoT card secure transfer method research based on blockchain[J]. Application of Electronic Technique，2021，47(12)：110-115.
IoT card secure transfer method research based on blockchain
Han Yulong1，Xiao Qing2，Liu Yaoyong1，Sun Dongyu1，Wang Zhenghong1
1.IC Innovation Center，China Mobile IoT Company Limited，Beijing 100037，China； 2.Xinsheng Technology Company Limited，Nanjing 210018，China
Abstract： Aiming at the problems of IoT card, such as serious illegal circulation, difficult supervise and traceability, an IoT card secure transfer method and system are designed. The system includes a blockchain subsystem, an information subsystem, some blockchain devices and a WeChat applet, and its secure transfer procedure includes initial entry of card information, transfer out application, transfer in application and traceability queries. Blockchain smart contract is used to implement circulating traceability rules, blockchain is used to implement distributed storage of message digest and possession change information, database is used to implement centralized storage of correspondence between IoT card ICCID number range and message digest, and SE-SIM is used to implement device key storage and digital signature. Through actual pilot application and analysis，the system can ensure the safety and credibility of traceability data, consider the batch concurrency performance, and improve the efficiency of supervision.
Key words : blockchain；IoT card；secure transfer；message digest；SE-SIM
