某种可能使用 IP 安全性协议 (IPSEC) 的网络级加密形式（例如虚拟专用网 (VPN)）是最可取的解决方案，虽然也有其他合理的选择。
Some form of network-level encryption, such as a Virtual Private Network (VPN), perhaps using IP Security Protocol (IPSEC), is the most obvious solution, although there are other reasonable choices.
本文分析了虚拟专用网存在的安全问题，介绍了虚拟专用网的主要安全技术，提出了设计安全虚拟专用网的一般原则与步骤。
This article analyses the security problems of the Virtual Privat Network, introduces its main security technology and put forward the general principles and measures of the security design of VPN.
用虚拟专用网和多级用户权限认证技术保证抽油井数据网络传输的安全性。
Besides, Virtual Private network (VPN) and authority authentication technique are used to ensure the safety of network transmission.
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