Various research groups have been looking at computational methods for determining authorship attribution over the past thirty years. One of the more valuable a

Various research groups have been looking at computational methods for determining authorship attribution over the past thirty years. One of the more valuable applications has nothing to do with anything IARPA would care about. Unless an author is rehashing the same content over multiple publications then there isn't much that can be done to attribute writing to the same source, and even then if it's publicly available then attributing it to a singular person is dubious. A great way to freak people out though and potentially stifle freedom of speech.