A method for copy protection of digital content, wherein at least a part
of the digital content is an active part enabling the execution of the
digital content, includes steps of storing digital content in a storage,
choosing reference storage blocks from the storage, creating dependencies
between the digital content and the chosen reference storage blocks and
executing by way of the active part the digital content only after
verification of the dependencies in order to verify the presence of the
chosen reference storage blocks. A storing medium also includes a digital
content being copy protected according to the method and to a reproducing
apparatus executes the steps of the above-described method.