Abstract: The present invention provides methods, apparatus and systems for embedding and detecting an electronic watermark without requiring signals for geometric compensation. A particular embodiment uses a periodic pattern with repetition as an embedded pattern itself, which has information embedded as an electronic watermark, and observes the change of its period upon detection to calculate the scaling factor. When detecting the electronic watermark, the scaling factor of images is calculated from digital data that underwent the scaling processing, and then the processing to detect the electronic watermark is performed based on the obtained scaling factor.

Abstract: The present invention provides methods, apparatus and systems for embedding and detecting an electronic watermark without requiring signals for geometric compensation. A particular embodiment uses a periodic pattern with repetition as an embedded pattern itself, which has information embedded as an electronic watermark, and observes the change of its period upon detection to calculate the scaling factor. When detecting the electronic watermark, the scaling factor of images is calculated from digital data that underwent the scaling processing, and then the processing to detect the electronic watermark is performed based on the obtained scaling factor.

Abstract: The present invention embeds predetermined information in the nucleotide sequence of DNA to identify the source of the genetic information in DNA. In particular, the pattern of a nucleotide sequence that normally does not appear in DNA is correlated with identification information for identifying a source of predetermined genetic information belonging to the DNA, and, in said portion of the DNA other than the gene, the nucleotide sequence that is correlated with the identification information is embedded in the DNA so as not to affect the genetic information in the DNA.