Z:gnu-www-ja-digital-inclusion-in-freedom--ed368f-The publishers aim to do more/en

The publishers aim to do more than punish sharing. They have realized that by publishing works in encrypted formats, which can be viewed only with software designed to control the users, they could gain unprecedented power over all use of these works. They could compel people to pay, and also to identify themselves, every time they wish to read a book, listen to a song, or watch a video. They could make people's copies disappear on a planned schedule. They could even make copies unreadable at will, if they have all-purpose back-doors such as found in Windows, or special features for the purpose.33