Methods of attack on a content screening algorithm based on adulteration of marked content

摘要

The way to attack the screening algorithm and apparatus is disclosed. Methods include the step of inserting at least one section of steps to be marking the downloaded content and legitimate content on the marked content, a step to subject the content to the screening algorithm. Screening algorithm screened two segments to determine if the step of selecting at least two segments in the step of determining a number of segments of the, content included in the content, the two segments are correctly verified by the screening algorithm ; and two segments that are may include the step of downloading the content when it is determined that the current verification through the screening algorithm. Once the content is downloaded successfully, the integrity of the downloaded content can be restored by removing the insert prior to the downloaded content, legal content.