Abstract
With the rapid development of Internet of Things applications, Internet of Things technology and applications have become more and more popular, and the perceived risk of sensing layer terminals, transmission and application has become more and more important. This paper first analyzes the security risks faced by the Internet of Things from the perception layer, transport layer and application layer; then describes the cryptographic algorithm technology and its application; Finally, based on the cryptographic technology, the security protection measures such as security authentication, data transmission and storage between the sensing layer, the edge side, the network layer and the cloud platform are designed respectively, and the security system based on the key system is proposed.
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