The continuous development of Internet technology has brought tremendous changes to people's lives. What is even more fascinating is what will these Internet technologies bring to us in the future? We live in the era of Internet technology, and everything around us is subversive and can change our daily lives at any time. Blockchain and the Internet of Things are by far the most significant inventions. 
The current IoT ecosystem is managed by a centralized security model and data management model, which is very common in today's enterprises. All devices connected to the Internet can overload the server, making the device vulnerable to network security. Distributing data and improving connectivity between devices are options for overcoming problems that are feasible in blockchain.
What is a blockchain? A blockchain can be called a digital classifier or a distributed open database-a spreadsheet that can replicate thousands of records in a computer network. These data are stored in the form of blocks, which are connected by chains derived from the term blockchain. The biggest advantage of blockchain is security, so when anyone tries to tamper with data, each block has a private key to protect it. The
blockchain has begun to bring major changes to the Internet of Things, and it has given more and more The ability to connect multiple devices to each other and enhance security. With the decentralized model, the Internet of Things will eliminate single points of failure and avoid threats associated with the centralized model. The encryption algorithm adopted by the blockchain will make the data more private and reliable, and it will be hacked by the middleman in the central server model. The work equipment and blockchain connection server used by the Internet of Things can reduce the cost and unpredictability of functions.
Peer-to-peer communication is the basic element of blockchain, which eliminates bottlenecks and inefficiencies. IoT devices supported by blockchain not only simplify business processes, but also achieve significant cost efficiency and improve customer experience. It also answers all questions of stability, record privacy, single point of failure, reliability and trust in a very consistent way.