Optimized attacking for NTLM authentication

[Hidenobu Seki <seki () atc yamatake co jp>]

For your information:

In October 2003, SecurityFriday developed a system for analyzing the new NTLM authentication that Windows XP SP1 and 
2000 SP4 use by default, in real time (within a couple of seconds.).

The system configuration is as follows:
OS: Windows XP 
CPU: Pentium 4 - 1.6GHz 
Memory: 128MB 
Hard disk space for precomputation: 1,632GB 
The number of passwords to be analyzed:  Approximately 630 billion 
The technology used for this system is based on "Optimized Attack" described in the document below:

Cryptanalysis of Microsoft's Point-to-PointTunneling Protocol (PPTP)
http://www.schneier.com/paper-pptp.pdf

Thank you.

urity at SecurityFriday.com

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