Secure Data Aggregation for Wireless Sensor Network using Lightweight Cryptography

Objectives: A reliable and effective data communication is required without imposing overheads in terms of energy, communication costs, processing and the network latency. Data aggregation is the process which provides capabilities like In-Network processing, reducing the communication overhead, eliminating redundant packet transmissions and increases the lifetime of the network. Methods: A method for implementing secure data aggregation using Lightweight Cryptographic primitives is proposed which is suitable for resource constrained networks. Security services provided include authentication, integrity and confidentiality. A Lightweight Cryptography algorithm SPECK is used for encryption and decryption of the aggregated data. Instead of using the same key repeatedly an unique key is generated for every session. Findings: By implementing security primitives it is possible to provide basic services that are required to make the established network immune to attacks. The proposed method is analysed in terms of execution time, memory usage and throughput and provides better results in comparison to existing standard encryption algorithms. Application/Improvement: It is very well suited for application in which the data needs to be processed periodically and continuously. The future scope of work includes analyzing the scalability and communication overhead for large network of nodes and Homomorphic evaluation of the algorithm to deliver end-to-end security services.