This paper

considering security threats faced by the typical LEACH protocol

proposes a novel effective solution

i.e.SZM-LEACH (secure zone-spanned multi-hop routing) for WSN.The main idea is to build the secure cluster-heads table which is based on partition autonomy

and to establish secure route by means of key management in route discovery process.The simulation experiments demonstrate that the proposed mechanism improves the performance of cluster-based routing significantly

in terms of data loss caused by malicious node

as well as network lifetime and energy consumption.