Abstract: Wireless body area network,as a new type of network,is widely used in health care,emergency rescue and other fields.However,the data collected by wireless body area network are mostly related to user’s personal information.In the actual application of the deployment process,it is bound to face serious sensitive privacy data leakage or malicious tampering risks.In order to protect the privacy security of user data in the body area network environment,this paper proposed a data security mix transmission mechanism,which is a K-anonymous mix transmission algorithm based on single-loop model (AMT-ML).The main idea is to divide the communication nodes into several communication loop networks,and apply the K anonymous scheme to the perceptual layer and the transport layer of hierarchical model.In order to ensure that the user data in each layer are relatively safe,this paper used multiple K anonymous processing.The experimental results show that the privacy protection of AMT-ML is superior to K-anonymous mix transmission algorithm based on single-loop model (AMT-SL) algorithm,and the communication distance of the multi-loop mode in the two layer network is less than that of the single-loop mode.

Key words: Wireless body area network,Data security,Data transmission