Wireless sensor networks for industrial control systems are widely used because of their advantages such as low cost and easy deployment, but their open characteristics expose the network communication to serious security threats. This study proposes a communication security mechanism for industrial control system wireless sensor networks based on chaotic mapping and state secret algorithm. Methodologically, firstly, the secure communication packet format specification is designed based on ZigBee application layer, and SM4 encryption and SM3 hash algorithm are implemented; secondly, the adaptive encryption method based on chaotic mapping is constructed, and the protection of sensitive data is realized by ciphertext layered addition. The results show that this scheme takes only 0.347 seconds in encrypting 6000 bytes of data, which is 0.5848 seconds and 0.2339 seconds faster than the SkipJack algorithm and RC5 algorithm, respectively; in terms of secure connectivity, this scheme enables the nodes in any communication range to establish the session key through the asymmetric key distribution mechanism, which is significantly better than the E-G scheme; in terms of storage consumption, the 650-node In terms of storage consumption, with 650 nodes, the storage space required by this scheme is much lower than that of the E-G scheme, and the advantage is more obvious with the increase of network size; in terms of anti-node capture, this scheme detects and updates the network key in time through the backup cluster head, which effectively improves the security of the whole network. Based on the experimental analysis, it can be concluded that the proposed security mechanism shows better performance in terms of encryption efficiency, space consumption and communication security, and is suitable for resource-constrained industrial control system wireless sensor network environment.
