An Internet of Things security system and communication method based on cryptographic technology

Abstract

The invention belongs to the field of cryptographic technology, and discloses a security system and communication method for the Internet of Things based on cryptographic technology, which registers device identifiers and application identifiers and generates protection keys, sign-in keys, data keys, instruction keys, and semi-encrypted keys. key, CPK key and SM9 key; encrypt all the generated keys and store them safely; send a request carrying the terminal ID to the cipher machine, and perform data encrypted transmission after authentication and negotiation between the registration device and the cipher machine; The data is encrypted for transmission, and the cipher machine decrypts the encrypted data after receiving it. The present invention uses a symmetric algorithm or an identification cryptographic algorithm, combined with a series of software and hardware products, to solve the security of the Internet of Things as a whole, and quickly realize functions such as safe channel, safe storage, data encryption, identity authentication, and digital signature. The invention ensures that the data in the Internet of Things is not stolen or tampered with, the identity is credible, and the data can be transmitted confidentially.

Description

technical field [0001] The invention belongs to the technical field of cryptography, and discloses a security system and a communication method for the Internet of Things based on cryptography. Background technique [0002] At present, the closest existing technology: while the Internet of Things is developing vigorously, the hidden security problems behind it are gradually emerging. The application of the Internet of Things needs to rely on the Internet or TCP / IP network to some extent, and there may be security risks in the Internet of Things environment from the hardware layer to the software application layer. [0003] At present, there is a fatal core problem in various Internet + applications such as smart cities, intelligent robots, and smart homes: how to identify identities on the Internet, and how to ensure that data is not stolen or tampered with. If people-people, people-things, and things-things can be trusted to identify each other, and through the confidentia...

AI Technical Summary

Problems solved by technology

[0005] (1) In the existing technology, no cryptography technology is used to solve the security problem of the Internet of Things, and functions such as safe channel, safe storage, data encryption, identity authentication, and digital signature cannot be quickly realized

It cannot be guaranteed that the data in the Internet of Things will not be stolen or tampered with, the identity can be trusted, and the data can be transmitted confidentially

[0006] (2) In the prior art, the encryption key KEK for the encrypted storage of the terminal key only depends on the terminal itself, and cannot be controlled by the cipher machine, and neither the terminal nor the platform can generate it independently

[0007] (3) In the existing technology, there is no distinction between device activation and sign-in. When the device is started and initialized, the device management and control platform cannot participate in the initialization of various keys of the device

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