A balanced security protocol of Wireless Sensor Network for Smart Home

The Smart Home is based on the Wireless Sensor Network (WSN) and Embedded System (ES). The most important parts of the Smart Home are low-power and high-security. And it is very vulnerable to various attacks ether an active or passive one in WSN. We shed light upon some existing security flaws in W2 and ZigBee. Some are quite useful to defend the various attacks, but don't suit for the Smart Home. We propose that a new balanced security WZ-lcp protocol which can achieve our requirements. First, in every facility we store two int which can be used as the keys for the authentication, and also can be changed with the time. Second, we do time synchronization to update keys. Finally the proposed scheme achieves balanced and security without costing power-wasting and data collision.