Encryption and decryption method for communication data between internets of things nodes

Abstract

The invention discloses an encryption and decryption method for communication data between Internet of things nodes. The encryption method includes the steps of s1, receiving a heartbeat message by anode in the Internet of things, and acquiring a message sequence number SN of the current heartbeat message, wherein SN is set as an initial secret key KA and is a natural number; s2, sequentially arranging n different algorithms in an algorithm library from F1 to Fn with n larger than 1, calculating the remainder m of KA divided by n, and selecting the mth algorithm FM; and s3, a node encryptinga communication data packet needed to be transmitted through the FM, and obtaining a ciphertext packet. The encryption and decryption method for the communication data between the Internet of things nodes is simple, and is suitable for the internet of things communication nodes which are low in power consumption, weak in operational capability and small in storage space, so that the safety of datatransmission between the communication nodes of the Internet of things is improved.

Description

technical field [0001] The invention relates to the field of the Internet of Things, in particular to a method for encrypting and decrypting communication data between nodes of the Internet of Things. Background technique [0002] With the development of Internet of Things technology and applications, emerging Internet of Things technologies have changed people's lives and promoted the development of society. The core of the Internet of Things technology is to complete the information exchange between things through the interconnection of things and realize the information communication between things, so as to realize information sharing, services and applications. [0003] The network layer of the Internet of Things is a communication network system that realizes the interconnection of objects. It is responsible for completing the information transmission and exchange between objects, and integrates all existing heterogeneous networks, such as the Internet, mobile communic...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects that the encryption and decryption methods of communication data in the prior art are relatively complex, the amount of calculation is large, and the data occupies a large space, which leads to the inability to be better used in the communication between nodes of the Internet of Things. Provide an encryption and decryption method and transmission system for communication data between nodes of the Internet of Things

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