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With the proposal of new power system, the construction of the power Internet of Things is also accelerating gradually. As an important equipment for collecting massive data, how to ensure the information security of the Internet of Things perception layer terminal has become an urgent problem to be solved. We proposed a secure access scheme for electric Internet of Things terminals, which includes three modules: secure SDK, terminal encryption management module and agent component. The secure SDK is used to realize terminal security encryption and decryption. The terminal encryption management module is mainly responsible for file and information management, and the agent component is mainly responsible for device configuration update. Based on this scheme, the terminal accesses the secure access gateway by changing device configuration information through the agent component, after the authentication of the unified password service platform is completed, the terminal encryption management module sends the digital certificate to the terminal remotely, the terminal establishes an encrypted transmission channel with secure access gateway through secure SDK to ensure the security of data transmission.

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