The primary goal of this software is to provide a facility for secure (against eavesdropping, including traffic analysis, and faked message injection) subnetwork interconnection across an insecure packet network such as the Internet.

• 此软件的主要目的是为跨互联网的子网间提供安全(防止窃听；包括流量分析；和虚假信息入注)的数据包通讯.