posted by wanda .
At issue in the twenty-first century is the trade-off between the necessity of writers, musicians, artists, and movie studios to profit from their work and the free flow of ideas for the public benefit. Movie (and music) industry participants claim that encryption programs are necessary to prevent piracy. Others, however, including the defendants in cases such as Universal City Studios, Inc. v. Corley, 273 F.3d 429 (2d Cir. 2001), argue that the law should at least allow purchasers of movies, music, and books in digital form to make limited copies for fair use.