Owed to the obvious characters of energy-constraint and dynamic topology

issues including confidentiality

integrality

authentication and no sufficient memory for abundance of key information

needed to be effectively solved in key management technique

especially in wireless sensor networks （abbreviation for WSN） applications. Aimed at some limitations like these on current research work

a key distribution scheme based on logic grid of WSN was proposed

which used the layer-cluster topologic structure. The complete process was described

involving resolution of coefficient matrix

keys’ initialization and specific realization. Compared with some other schemes

such as SPIN protocol and logic key tree methods

simulation results show its advantages on security

memory performance and energy- consumption

etc..