Abstract: In recent years,with the development of the block chain technology,it has received extensive attention.It is generally regarded as an important tool to solve the problem of data security.RFID big data is important source of data in the Internet of things,and the security requirements for data are also very high.Data tracing is one of the important applications of RFID networking technology,it is widely used in original traceability of agricultural products,raw materials,industrial production and consumer goods and parts traceability,security and other aspects.Block chain plays an important role in improving the safety of big data source.This paper presented a RFID data source security model based on block chain technology,and block chain technology is used in the tracing process of RFID data,the formation of multi information transparency,sharing,participation and fidelity in the traceability chain.The block chain books are formed in production,processing,marketing and other aspects of the establishment of RFID tracing goods,the whole chain traceability path RFID big data is established,to end users,so as to realize the safety management of the traceability of RFID big data.

Key words: Block chain technique, RFID big data, Security provenance