An object of the present invention is to provide a simple apparatus for and a simple method of embedding and extracting digital information with little clue to a third party as to embedded digital information with less effort, and the embedded information is securely reconstructed thereby....http://www.google.fr/patents/US6639997?utm_source=gb-gplus-shareBrevet US6639997 - Apparatus for and method of embedding and extracting digital information and medium having program for carrying out the method recorded thereon
Apparatus for and method of embedding and extracting digital information and ...
