The call for greater US government transparency just got louder: Dropbox has filed a Foreign Intelligence Surveillance Court brief that endorses petitions to discloseexact national security request numbers. Much like LinkedIn, Dropbox believes that limiting disclosures to broad ranges hurts transparency by implying that smaller firms get as many requests as larger rivals. The ban on exact figures also violates a First Amendment right to publish specific information, according to the cloud storage provider. We likely won't know the effectiveness of the brief for some time -- or ever, if the court proceedings remain a secret -- but Dropbox can at least say that it made its case.