In short, government intervention stock market is the "shell" company formed an important reason. 1.2, Chinas "shell" company to become a scarce resource in the system background mentioned above, the management of the securities market of China implemented a strict access restrictions, securities issued strict audit system in the "Securities Act" before the implementation of the approval system. In securities, securities issued by the issuer, not only to the real situation to the full open condition, and must comply with relevant laws and the securities regulatory authority of the necessary conditions, the securities authorities the power to veto the release does not meet the specified conditions apply. In addition, our market size for the control, the "total control, limit the number of reported home," and the amount allocated enterprises to enter the stock market very difficult. However, listed companies in China authorized by the government but also has many privileges, such as low-cost to raise capital, tax incentives, advantages such as product advertising, and because of the special nature of our stock, the majority state-owned shares of listed companies holding the status of absolute, and the bankruptcy of difficulties, the listed companies is almost for life. All these monopoly interests, allowing companies to produce rent-seeking behavior, using various means to play through the competent authorities at all levels, the cost is quite high, sometimes much higher than the companys normal cost of issuing shares, and some companies even illegal for issuing shares and listing . Most companies that rent-seeking rent-seeking costs of hopelessness or too high, they turned to listed companies in the "shell" companies, mergers and acquisitions for them to achieve the backdoor listing, so the "shell" company created the market demand; as a "shell" companies, the advantages they hope to change their business into the inferior, so that the "shell" transactions to occur.
b) use of technology to replace the existing simple TKIP WEP encryption. Advantage of this approach does not need to replace all the hardware, simply by updating drivers and software can be achieved. In addition, the 802.11i is currently being developed provides encrypted enhanced WEP2, and enhanced authentication protocol EAP. However, the maturity and promotion 802.11i Shangqie take some time. c) on the WLAN using VPN technology to further enhance the security of critical data. VPN technology is also not specifically designed for the WLAN, but can be enhanced as a key WLAN protection. 7. Using WLAN-specific network intrusion detection system to monitor the timely detection of unauthorized access to the AP and the fake client, and the security situation on the WLAN for real-time analysis and monitoring.