A Novel Algorithm for Securing Data Aggregation in Wireless Sensor Networks

Abstract

Data aggregation is an important method to reduce the energy consumption in wireless sensor networks (WSNs). However, in hostile environments, the aggregated data can be subject to several types of attacks, and provide security is necessary. Recently, several secure data aggregation schemes based on homomorphic encryption have been proposed for wireless sensor networks. These data aggregation schemes provide better security compared with traditional aggregation since the aggregator can directly aggregate the ciphertexts without decryption. Based on our survey of existing research for ensuring secure data aggregation in WSNs, an Efficient Secure data aggregation scheme based on fully Homomorphic Encryption (E-SHE), is proposed. This scheme can protect end-to-end data confidentiality and support arbitrary aggregation operations over encrypted data. In addition, by utilizing message authentication codes (MACs), we can also verify data integrity during data aggregation and forwarding processes so that false data can be detected. Our experiments show that E-SHE requires less computation overheads and communication than previously methods and can effectively preserve data integrity, and precise data aggregation rate while consuming less energy to extend network lifetime.