"In an interview, von Lohmann said Apple was using the DMCA to
stifle free speech. "Apple is essentially saying here that people
can't even talk about the mechanisms that Apple uses to lock in its
music to the iTunes software," he said.
"The checksum mechanism does not protect copyright on iTunes
music; it's just supposed to confirm that the iPhone is
communicating with iTunes, he added. "Nobody has ever suggested a
purpose of this other than forcing iPod owners to use Apple's
software," he said. "It's an anticompetitive tie-in device.""