首页>
外国专利>
Protect content from illegal duplication by proving the existence of a complete dataset using security identifiers
Protect content from illegal duplication by proving the existence of a complete dataset using security identifiers
展开▼
机译:通过使用安全标识符证明完整的数据集的存在,保护内容免遭非法复制
展开▼
页面导航
摘要
著录项
相似文献
摘要
A number of data items are selected for inclusion in a data set so as to discourage a transmission of the entire set over a limited bandwidth communications path, such as the Internet. The data set includes an entirety parameter that is used to determine whether the entirety of the data set is present. In a preferred embodiment, the entirety parameter is a hash value that is based on watermarks of each data item. When presented for rendering, the watermarks of the data items in the presented material are read and a hash value based on the presented watermarks is computed. A mis-match between the computed hash value and the entirety hash value contained in the data set indicates that less than the entirety of the data set is being presented, and the rendering is prohibited.
展开▼