Message to PPTP users: Microsoft's MS-CHAPv2 protocol weakness

"ChapCrack is designed to enable users to crack passwords that are used to help secure PPTP connections. PPTP (point-to-point tunneling protocol) is one of the protocols used for securing remote connections. The MS-CHAPv2 (Microsoft Challenge Handshake Authentication Protocol version 2) is the algorithm used to do the secure negotiation for some PPTP implementations."

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