The invention relates to a block chain-based power
Internet of Things terminal security
access method and
system. The method comprises the following steps of S1, dividing a virtual
local area network; s2, deploying an SDN controller to manage and
control network traffic; s3, performing decentralized
identity recognition by using a block chain, and executing an automatic identity
authentication process by using a
smart contract; s4, carrying out preliminary identity
verification based on the
certificate, and carrying out secondary
authentication in combination with the biological characteristics and the position information of
the Internet of Things equipment; s5, performing uplink according to the critical degree, generating a unique
fingerprint of the data by using a
hash function, and storing the unique
fingerprint in a block chain to ensure
data integrity and prevent tampering; and S6, applying a strong
encryption algorithm in a transmission layer and a data storage process to ensure
data security and realize a
homomorphic encryption technology, so that data operation is performed in an
encryption state, and privacy is protected. According to the invention, the efficiency and security of terminal access are improved, and comprehensive protection and flexible management of the network and data are realized through the block chain and SDN technology.