Verifying authorship for forensic purposes: A computational protocol and its validation.

Forensic Science International : Synergy
Patrick Juola

Abstract

Being able to identify the author of an anonymous or disputed document is an important task in forensic science. This can be treated as a form of pattern evidence based on writing style, but the subjective analysis of writing style may have all the well-known problems of other forms of subjective pattern evidence. In this paper, we demonstrate a computer program to address these issues. This program analyzes a pair of documents (a known document and a questioned document) to determine if they were written by the same author. More importantly, this paper also validates the accuracy of this program through a large-scale series of controlled experiments involving English language blogs. Across more than 32,000 different document pairs, the system achieved a measured accuracy of 77%. This paper concludes that this system not only addresses a key problem in forensic linguistics, but also provides the repeatability, reproducibility, and measured accuracy levels that are key to the advancement of forensic science.

References

Dec 6, 2005·Forensic Science International : Synergy·Itiel E DrorAilsa E Péron
Mar 11, 1887·Science·T C Mendenhall
May 18, 2016·Forensic Science International : Synergy·Didier MeuwlyRudolf Haraksim
Apr 14, 2018·Proceedings of the National Academy of Sciences of the United States of America·Suzanne BellArturo Casadevall

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