A quick preview

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John the Ripper really doesn't like it when you try to load around 300,000 password hashes into it...

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The RockYou 32 Million Password List Top 100

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Tool Name: PRINCE (PRobability INfinite Chained Elements) Version Reviewed: 0.12 Author: Jens Steube, (Atom from Hashcat) OS Supported: Linux, Mac, and Windows Password Crackers Supported:  It is a command line tool so it will work with any cracker that accepts input from stdin Blog Change History: 1/4/2015: Fixed some terminology after talking to Atom 1/4/2015: Removed a part in the Algorithm Design section that talked about a bug that has since been fixed in version 0.13 1/4/2015: Added an additional test with PRINCE and JtR Incremental after a dictionary attack 1/4/2015: Added a section for using PRINCE with oclHashcat Brief Description:   PRINCE is a password guess generator and can be thought of as an advanced Combinator attack . Rather than taking as input two different dictionaries and then outputting all the possible two word combinations though, PRINCE only has one input dictionary and builds "chains" of combined words. These chains can have 1 to N wo...
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I'm in Chicago at the ACM CCS conference , and the paper I presented there: "Testing Metrics for Password Creation Policies by Attacking Large Sets of Revealed Passwords", is now available online. Direct Download of PDF View Online Since I had the paper and presentation approved through my company's public release office I was given permission to blog about this subject while the larger issue of my blog is still going through the proper channels. Because of that I'm going to limit my next couple of posts to this subject rather than talking about the CCS conference as a whole, but let me quickly point you to the amazing paper " The Security of Modern Password Expiration: An Algorithmic Framework and Empirical Analysis ", written by Yinqian Zhang, Fabian Monrose and Michael Reiter. In short, they managed to obtain a great dataset, their techniques were innovative and sound, and there's some really good analysis on how effective password expiration poli...
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