Many people don’t realize that Microsoft Word encodes information about the authors and editors of each document. It’s called “metadata.” For example, some of this data is contained under the “Properties” section of the “File” pull down menu.
An article in the New York Times describes what can be revealed when metadata is examined:
It hardly ranks in the annals of “gotcha!” but right-wing blogs were buzzing for at least a few days last week when an unsigned Microsoft Word document was circulated by the Democratic National Committee. The memo referred to the “anti-civil rights and anti-immigrant rulings” of Samuel A. Alito Jr., a federal appeals court judge who has been nominated to the Supreme Court by President Bush.
The stern criticisms of Judge Alito rubbed some commentators the wrong way (Chris Matthews of MSNBC called it “disgusting” last Monday). But whatever the memo’s rhetorical pitch, right-leaning bloggers revealed that it contained a much more universal, if unintended, message: It pays to mind your metadata. . . .
According to some technologists, including Dennis M. Kennedy, a lawyer and consultant based in St. Louis, (denniskennedy.com), metadata might include other bits of information like notes and questions rendered as “comments” within a document (“need to be more specific here,” for example, or in the case of my editors, “eh??”), or the deletions and insertions logged by such features as “track changes” in Microsoft Word.
A blogger searched the Alito memo for metadata and could figure out some of the authors of the document. According to the NYT story: