今天，我国备行各业正处于网络技术应用大发展的年代，网络信息安全问题是摆在各党政机关、企事业单位面前的头等大事之一。由北大青鸟公司研制的“JB—SG2安全保密网关”系统不仅为社会各界网络信息的安全提供了一种防护手段更重要的是它还显示了国内在网络信息安全技术方面的 Today, all walks of life in our country are in the era of great application of network technology. The issue of network information security is one of the top priorities in front of various party and government organs, enterprises and institutions. The “JB-SG2 Security Gateway” system developed by Beida Jade Bird Company not only provides a means of protection for the safety of network information in all walks of society, but more importantly, it also shows that in the domestic network information security technology