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    Forensic Authorship Analysis

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    dangrsmind

    Posts : 676
    Join date : 2010-02-16
    Location : San Francisco

    Forensic Authorship Analysis

    Post by dangrsmind on Mon Mar 08, 2010 10:30 am

    Some folks here (well one person!) expressed an interest in understanding how authorship analysis software worked. I found the presentation which I feel is a fairly simple description of systems like mine. If you are interested, take a look at this presentation and feel free to ask me any questions you have about it.

    Presentation: http://www.isiconference.org/2003/resourses/presentation/AUTHORSHIP_ANALYSIS__BY_RO.PPT

    More here: http://ai.arizona.edu/research/coplink/authorship.asp

    The only questions I won't answer are specific questions about my software and how it works. The reason for this is I have some innovations that I am planning to patent. I can't disclose any of these publicly until after the patent application is submitted.

    My approach is very similar to that described here, I extract features, use a machine learning algorithm, etc. however I have developed some innovations that I feel are unique and valuable and can improve performance beyond what is described in this presentation and other papers in the literature.

    I've been working on this all for about 9 months.
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    dangrsmind

    Posts : 676
    Join date : 2010-02-16
    Location : San Francisco

    Re: Forensic Authorship Analysis

    Post by dangrsmind on Mon Mar 08, 2010 10:18 pm

    Some interesting facts about word distributions: http://folli.loria.fr/cds/2006/courses/Baroni.Evert.CountingWordsAnIntroductionToLexicalStatistics.pdf

    You shouldn't need more than basic stats to understand this one...
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    dangrsmind

    Posts : 676
    Join date : 2010-02-16
    Location : San Francisco

    Re: Forensic Authorship Analysis

    Post by dangrsmind on Tue Mar 09, 2010 1:28 pm

    Here's an interesting side area, authorship analysis of computer source code. http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.110.7627&rep=rep1&type=pdf

    These techniques are used by both law enforcement professionals AND criminals in trying to determine who made a given web site or web board. LE uses these techniques to track criminal organizations that create carding sites as one example. Criminals can also use a similar approach to identifying potential "honey pots" set up by LE.

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