Patent ID: 8972724
Filing Date: 2015-03-03
Classification: H04N

Abstract:
1. A digital content management system comprising: a digital watermark embedding unit which generates a new file which has a file name used as a digital watermark, and embeds the generated new file which has said file name into a digital content to be managed, said digital content including a file set having a plurality of files, said generated file being inserted into said file set of said digital content; a digital watermark information storage unit which stores, as digital watermark information, said file name used as said digital watermark embedded in said digital content by said digital watermark embedding unit, while correlating said file name with identification information of said digital content having said digital watermark embedded therein; and a digital watermark detection unit which detects said file name used as said digital watermark, stored in said digital watermark information storage unit, from said digital content to be verified, referring to said digital watermark information stored in said digital watermark information storage unit, wherein said new file, which has the file name used as the digital watermark, does not include said identification information of said digital content or identification information of said plurality of files contained in said digital content, said new file which has the file name used as the digital watermark is embedded in a said digital content while correlating said file name with identification information of said digital content, and said digital content management system further comprises a target digital content detection unit which detects the digital content, in which said file name used as said digital watermark is detected by said digital watermark detection unit, as said digital content to be managed, wherein said digital watermark embedding unit further comprises: a number assigning unit which detects file names, or file names including directory names, of files contained in said digital content, and assigns different numbers to the respective detected file names; a random number generating unit which generates random numbers; and a file name generating unit which specifies the file names having the assigned numbers corresponding to the generated random numbers, and generates the file names used as said digital watermarks based on the specified file names, and, said digital watermark embedding unit generates files which have said file names generated by said file name generating unit, and embeds said files as said digital watermarks into said digital content.