Section 1201 divides technological measures into two categories: measures that
prevent unauthorized access to a copyrighted work and measures that preventunauthorized copying2 of a copyrighted work. Making or selling devices or services that
are used to circumvent either category of technological measure is prohibited in certain
circumstances, described below. As to the act of circumvention in itself, the provision
prohibits circumventing the first category of technological measures, but not the