DeCSS是个电脑程序，用来解除以CSS（Content Scrambling System，内容扰乱系统）加密的DVD影片。 　　前文所解释的一些术语都来自业界指定的标准，而DeCSS却完全不同。要说DeCSS，首先我们必需来谈谈CSS。 　　CSS（Content Scramble System）内容扰乱系统是为了防止数字方式的复制，最初由松下和东芝开发，主要目的还是为了保护DVD光盘不会被非法复制，但是1999年，这个复杂的加密系统被一位当时仅有十六岁的天才挪威少年用一个几十D的小软件所破解，那个软件就叫做DeCSS。-DeCSS is a computer program used to lift the CSS (Content Scrambling System, the contents of disrupting the system) encrypted DVD movies. Previously explained some of the terms from the industry-specified standards, DeCSS is completely different. Say DeCSS, we must first talk about the CSS. CSS (Content Scramble System) Content Scramble System in order to prevent the copy of the digital approach, originally developed by Panasonic and Toshiba to develop, the main purpose or for the protection of DVD discs will not be illegally copied, but in 1999, this complex encryption system is one was crack only 16-year-old genius Norwegian teenager with a dozens of D software, that software called DeCSS.