Wireless Sensor Networks are susceptible to communication failures and security attacks due to broadcast nature of communication. Multipath based communication techniques were designed to address communication failure. This paper proposes Secure Approximate Data Aggregation (SADA) in which synopsis are generated using primitive polynomial and Message Authentication Codes (MACs) are transmitted along with the synopsis to ensure integrity. SADA provides data freshness and integrity at a communication cost of O(1). Simulation results show that the SADA protocol incurs lower energy consumption and communication and computation cost compared to the state-of-the art protocols [1] [2].
