PPTP加密原理是啥是否只要服务端和客户端可靠,网络不可靠的情况下数据也绝对安全

参考wiki Point-to-Point Tunneling Protocol看这段The PPTP specification does not describe encryption or authentication features and relies on the Point-to-Point Protocol being tunneled to implement security functionality. However, the most common PPTP implementation shipping with the Microsoft Windows product families implements various levels of authentication and encryption natively as standard features of the Windows PPTP stack. The intended use of this protocol is to provide security levels and remote access levels comparable with typical VPN products.明确说到PPTP标准中并没有描述其具有的验证和保密性质。(所以协议本身没有密码学意义上安全性)不过微软提供的实现里额外附带了这些功能。如果本地是用了AES,然后PPTP传输的话,自然可以保证一定的安全性。
■网友
rsa公鈅本来就是公开的


    推荐阅读