Research On The Security Data Aggregation Of Wireless Sensor Networks Based On Sharding

With the development of wireless communication technology and microelectronics technology in recent years,Wireless Sensor Networks(WSN)have been widely used in various fields.The security of private data is facing with great challenges because sensors are lack of effective security protection mechanism.The occurrence of data leakage event has caused many unnecessary losses to production and everyday life.In order to solve the problem of data security in WSN,data encryption technologies and various security aggregation schemes have emerged as the times require.Among them,the security scheme based on slicing technology has become a hot topic which can provide high security for data aggregation.In this paper,a novel slicing-based security technology of data aggregation is taken into consideration and the contents include e the topology control,the data slicing scheme and the aggregation mode which attempt to improve the performance of slicing aggregation mechanism in terms of security,network traffic control,energy consumption and aggregation accuracy.Firstly,a network topology suitable for data slicing is constructed.The existing slicing aggregation schemes do not pay their attention to the topology constructing and there are also many shortcomings in the energy consumption of nodes and the control of the number of slicing.In this paper,a new topology is proposed according to the energy consumption and topological stability which is more suitable for the slicing mechanism together.Meanwhile,the signal intensity is used as the reference to establish the connection between nodes which makes the connectivity more reasonable and increases the stability of the topology.Secondly,the method of data slicing is studied.The amount of traffic in the network will increase dramatically when a slicing scheme is adopted.Therefore,how to reduce the traffic has become one of the challenges in WSN.In addition,the existing slicing techniques focus on how to control the number of slices without balancing the data size and energy consumption of node.As a result,the optimization of node energy consumption is difficult to be conquered.Therefore,this paper restricts that a leaf nodes only send data slices to its brother nodes and parent node.The purpose is to control the number of data slices in an effective manner and avoid to send too many slices.Furthermore,an energy-efficient adaptive slice-based security data aggregation scheme(ASSDA)and it combines data slicing process with energy consumption calculation which divides data into different sizes and transfers them to diverse nodes.This can reduce the energy consumption in the process of data transmission effectively under the constraint of security.Finally,the methods of data mixing and aggregation is discussed.In the stage of data mixing,a data sending method based on father and brother nodes is proposed according to the data slicing mechanism in order to control the amount of data transmission and reduce the probability of collision between data slices.In the data aggregation stage,a region aggregation method based on parent node is proposed with the aim of improving the accuracy of data aggregation,which provides the security data aggregation,promotes the data aggregation accuracy,reduces the amount of data transferred to the upper layer and improves the utilization of node energy effectively.