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.
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。
IPSEC protocol is a kind of network security standard which is framed by IETF organization for safe communication, and it can be used to provide security protection for IP and higher layer protocols.
IPSEC协议是IETF组织为在IP层提供安全通信而制定的网络安全标准，能为IP及其上层协议提供安全保证。
IPSEC protocol is a kind of network security standard which is framed by IETF organization for safe communication, and it can be used to provide security protection for IP and higher layer protocols.
IPSEC协议是IETF组织为在IP层提供安全通信而制定的网络安全标准，能为IP及其上层协议提供安全保证。
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