Research On Privacy Protection Of Data Aggregation In Wireless Sensor Network

The wireless communication,the embedded technique and the microelectronic system are driving the continuous advancement of Wireless Sensor Networks(WSNs).Nowadays,the application fields of WSNs have been extended from the initial military battlefield to environmental monitoring,modern medical,smart home and so on.The energy of sensor nodes is too limited to process a lot of data,so Data Aggregation(DA)technique is usually adopted to alleviate the energy consumption pressure of the network by removing redundant information and reducing the amount of data transmission.However,a lot of data is stored in the Aggregation Nodes(ANs)in the process of aggregation,which becomes an important target to be attacked by adversaries.In addition,with the continuous expansion of network application scenes,single query and aggregation methods can no longer meet the needs of network applications.Based on the above-mentioned issues,we consider the efficient privacy preserving and the energy consumption of DA as our main research topics and combine multi-query with multi-aggregation to enrich the functions of network.The main contents of the study are described as follows.(1)To deal with the privacy puzzle of the multiple query method,this paper studies a multiquery data aggregation privacy preserving protocol.The protocol adopts the elliptic curve encryption algorithm to assign corresponding key to each query and increase the number of keys in order to improve the difficulty of cracking ciphertext.In addition,it uses Message Authentication Code(MAC)to verify data integrity.And the responses of different queries are aggregated into one data packet,which can enrich the functions of WSNs.Therefore,the network can replies multiple query requests at the same time reduces the numbers of the communications and decreases the communication costs.(2)The paper considers multi-aggregation privacy preserving protocol to solve the single problem of aggregation way and enrich the function of the network.The protocol combines the homomorphic encryption scheme with differential perturbation to construct differential mapping function sets,which reduces the probability of different nodes selecting the same function and protects the network privacy.Based on the privacy preserving way,the addition aggregation privacy preserving mechanism and the non-addition aggregation privacy preserving mechanism are proposed respectively to implement addition and non-additive aggregation,which can expand the application scenarios of the network and improve the universality of WSNs.At the same time,the original data value is reduced by data mapping in order to decrease the amount of information transmission and reduce the communication costs.(3)The addition and non-addition aggregation mechanism of the multi-aggregate function privacy preserving protocol could not consider the integrity protection for data.So a differential perturbation multi-aggregation fault-tolerant mechanism is proposed,which uses the polynomial to fit the mapping data to protect the integrity of the privacy data and improve the ability of privacy preserving.