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一、引言随着连入Internet的用户迅速增加,各公司都在考虑怎样利用Internet获取更多的商业利益。早期,公司只是利用Internet宣传其形象和产品,提供WWW访问。现在可以利用Internet实现网络银行、电子购物和电子商务等。实现这些新功能,必须采用安全技术。虚拟专用网(VPN)技术将是重要手段之一。VPN的市场正在迅速增长,2000年可能已达到数十亿美元。通过Internet传输,VPN可以降低费用、增加灵活性,而且比传统的网络连接(如通过
I. INTRODUCTION With the rapid increase in the number of users connected to the Internet, companies are considering how to use the Internet to gain more business benefits. In the early days, companies simply used the Internet to promote their images and products and provide WWW access. Now you can use the Internet to achieve Internet banking, e-shopping and e-commerce. To achieve these new features, you must use security technology. Virtual Private Network (VPN) technology will be one of the important means. The market for VPNs is growing rapidly, potentially reaching billions of dollars in 2000. Through the Internet transmission, VPN can reduce costs, increase flexibility, but also than the traditional network connection (such as through