This paper mainly studies the method of static analysis techniques; discuss static analysis techniques status and progress, as well as the characteristics of static analysis.

As the main secret-key encryption techniques of the wireless local area network (WLAN) have been proven to be unsafe, wireless network security is faced with serious challenges. It is unpractical for home users and small companies to buy expansive network equipments to improve the network security. Therefore, the secure strategy of wireless network needs to be changed. In this paper, we first introduce secure issues of the main secret-key encryption techniques currently adopted by the most popular commercial wireless routers. Then we propose a new strategy for small-scale IEEE 802.11 wireless local area network which can strengthen the network security. The new secure strategy is based on web authentication with unshared key and virtual local area network (VLAN) in wireless network. It can provide protection against practical attacks which are popular nowadays. Moreover, it is simple, wieldy and low-cost.

This paper puts forward a simple algorithm to make color images lighter based on Wavelet transformation and histogram smoothing. This algorithm uses HIS space which is based on human visual features. Without changing hue, it can conduct histogram smoothing in low brightness frequency domain through wavelet decomposition and make the images lighter, which at the same time avoids vagueness of details and increase of noises. According to experiment results, this algorithm can make low brightness color images lighter effectively with low time complexity.

As the main secret-key encryption techniques of the wireless local area network (WLAN) have been proven to be unsafe, wireless network security is faced with serious challenges. It is unpractical for home users and small companies to purchase expensive network equipments to improve the network security. Therefore, the secure strategy for wireless network needs to be changed. In this paper, we first introduce secure issues of the main secret-key encryption techniques currently adopted by the most popular commercial wireless routers. Then we describe our initial designs and propose a new strategy for small-scale IEEE 802.11 wireless local area network which can strengthen the network security. The new secure strategy is based on web authentication with unshared key and virtual local area network (VLAN) in wireless network. It can provide protection against practical attacks which are popular nowadays. Moreover, it is simple, easy to use and price moderate. At last, we evaluate the performance of the new secure strategy and give our conclusions.