现在，企业正在竞相创建稳定、经济的安全广域网连接。
Now, companies are competing to create stability and economic security of wide area network connectivity.
由于以下安全性和性能原因，4gl工具不能在广域网(WAN)上运行。
4gl tools cannot be run over a wide area network (WAN) for reasons of security and performance.
文中在一种基于WWW的分布式信息系统的背景下，提出一种在广域网(WAN)的环境中安全传输数据的解决方案。
Bring forward a security data transmission approach in WAN-based environment on the background ofa WWW-based distributed information system.
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