An Authentication Mechanism of Digital Contents in Pervasive Computing Environment

Digital content services in pervasive computing environment provide a vast range of information and rapidly. However, in this environment where various information flow the copyright infringement problems such as modification and fraudulent use of digital content without permission of copyright holder are increased. In this paper, we proposed an original digital content authentication method to protect the intellectual property from such infringements. The proposed mechanism sets the scope of content usage and limits the access privilege to digital content by copyright holder. The modification of digital content and its usage are act of copyright infringement. That is, modification of color and resolution out of the limited scope and partial modification or extraction are part of copyright infringement. Consequently, we proposed a mechanism which proves the fact of trespass by extracting and comparing the similarity of the original and the target content.