DECENT encrypts content and stores it in redundant pieces across the peer-to-peer network. In order to assemble and view it, you must possess the proper key, which may require you to purchase the content with DCT tokens. The original uploader is permanently recorded, so any attempts to upload a duplicate will be rejected by the network.
DECENT goes even further, however, with its utilization of digital fingerprinting technology. Theoretically, one could slightly alter a file so that its hash value was different (like by changing the color of a few pixels), but DECENT thoroughly analyzes all content to detect such copies. This prevents all copyright infringement on the network in a decentralized and autonomous way, protecting the original files.