Data security authentication transmission method and device for Internet of Things terminal

The invention discloses a data security certification transmission method and device for an Internet of Things terminal. The method comprises the steps: presetting identification key pairs in a factory of an Internet of Things terminal, and presetting a corresponding public key matrix in an edge gateway; according to a preset identification key pair of the Internet of Things terminal and a presetpublic key matrix of the edge gateway, completing the bidirectional authentication of the Internet of Things terminal and the edge gateway, and acquiring a communication encryption/decryption key; andcompleting the encryption and decryption of transmission data between the Internet of Things terminal and the edge gateway by using the communication encryption/decryption key. And the problem that the traditional safety means is difficult to meet the Internet-of-Things scene is effectively solved. A key management system which is realized based on a public key cryptography technology and can beapplied to an Internet of T