1. See cascading style sheets.
2. Acronym for Content Scrambling System. An encryption feature added to DVDs distributed with approval of the MPAA. CSS looks for a matching region code on the DVD and the playback device. If the codes do not match (such as for a DVD purchased in Japan and a DVD player purchased in the United States), CSS will not allow the DVD to play. CSS also will not allow a DVD to be played on playback equipment not approved by the MPAA. See also deCSS, region code.
3. Stands for cross-site scripting, a Web server vulnerability
resulting from poor input validation.
See: cross-site scripting (CSS).