MS PPTP密码分析  

Cryptanalysis of Microsoft's Point-to-Point Tunneling Protocol

作　　者：王 坤[1] 李 建[1] 谢培泰[1] 

机构地区：[1]国家数字交换系统工程技术研究中心,郑州450002

出　　处：《计算机工程》2002年第4期137-139,164,共4页Computer Engineering

摘　　要：点到点隧道协议(PPTP)是用来保护在TCP/IP上的PPP连接安全的、分析Microsoft’s Windows NT是如何实现PPTP的。给出如何破译MS CHAP和RC4加密协议(MPPE),如何攻击由MS实现的PPTP的控制隧道,而不需要破译PPTP。The point-to-point tunneling protocol (PPTP) is used to secure PPP connections over TCP/IP links. In this paper we analyze Microsoft's Windows NT implementation of PPTP. We show how to break both the challenge/response authentication protocol (Microsoft CHAP) and the RC4 encryption protocol (MPPE), as well as how to attack the control channel in Microsoft's implementation. These attacks needn't break PPTP, but only Microsoft's implementation of the protocol.

关 键 词：PPTP MS-CHAP MPPE 密码分析 点到点隧道协议 通信协议 

分 类 号：TN915.04[电子电信—通信与信息系统]