DeCSS is a free Windows utility that breaks the weak DVD encryption and access control scheme called Content Scrambling System (CSS) and enables the user to copy all or part of a DVD to the user’s hard disk. It also allows users to evade DVD region locking and skip the pre-dews and other commercial content included with DVD releases. Released on the Internet in 1999, DeCSS soon became the focus of significant controversy and numerous lawsuits.
According to the DVD Copy Control Association (CCA), the industry consortium responsible for the DSS encryption scheme, DeCSS is intended to promote the “piracy” of copyrighted DVD content. Claiming misappropriation of trade secrets,” the organization sued more than 500 people in 11 countries for making DeCSS available for downloading or providing links to download sites. See CSS, DVD, DVD region locking.