Method and apparatus for controlling the distribution and use of a digital job and recording medium for storing a digital job

摘要

"METHOD AND APPARATUS TO CONTROL THE DISTRIBUTION AND USE OF A DIGITAL WORK AND RECORDING SUPPORT TO STORE A DIGITAL WORK". The present invention relates to a method and apparatus for controlling the distribution and use of a stored digital work together with usage rights information displayed on a recording medium. The posted usage rights information is encrypted or verified using hidden information that changes with each change of usage rights information. The hidden information can be an encryption key used to encrypt the right of use information, or a proof of a block of data containing the right of use information. Thus, an "attack to copy and restore" is unsuccessful, since it will lead to a mismatch between the hidden information and the restored usage rights information.