Authentication technique is one of the core techniques of VPN, it is the safeguard of VPN together with encrypt technique, these two techniques make the name-VPN mathes the reality.

• 认证技术是虚拟专网的核心技术之一，它和加密技术是虚拟专网的安全保障，正是有了它，虚拟专网才名副其实。