Safe and reliable wireless sensor network (WSN) is an important branch of modern communication systems, and is an important technical support for ubiquitous communication. However, a large number of network attacks will threaten data security, which will seriously affect network reliability and greatly reduce the use value of WSN. This paper proposes a security model for lowenergy consumption tree routing protocols (LCTR), which achieves authentication and data integration using message authentication code (MAC) and digital signature (DS) techniques. Some common MACs and DSs have been taken as the reference to analyze the performance of LCTR. Simulating results show that with the model of LCTR, the safe transmitting rate of information is increased by 23% at most, and the network lifetime is increased by 5% at most.

data integration  /  energy efficiency  /  authentication  /  wireless sensor network