Novel chaotic block encryption scheme for WSN based on dynamic sub key

In view of high efficiency and security requirements in WSN encryption algorithm，a lightweight chaotic block encryption algorithm was designed and a novel scheme of dynamic sub keys extension was proposed.To greatly reduce the computing burden of WSN nodes，this scheme made full use of WSN cloud servers monitoring platform，which was powerful in data computing and processing，and transfered the sub keys synchronization task from nodes to cloud servers.Experimental results and performance analysis show that the scheme has good characteristics of diffusion，confusion and statistical balance，strong key security and high algorithm efficiency.It has a good application prospect in the field of WSN communication encryption.