State-of-the-Art Digital Watermarking Techniques for Content Authentication with a Case Study of eLearning System
Fahd N. Al-Wesabi, Kulkarni U. Vasantrao
Journal of Intelligent Computing, Vol. 3, No. 3, 2012.
DOI: 
Link: http://www.dline.info/jic/fulltext/v3n3/1.pdf
Abstract:
Digital Watermarking (DWM) is a recent technology used to strengthen the security of many applications in different fields. It is a signal which is permanently visible or invisible embedded into digital data called digital cover medium. Content security is one of the fields that are tightly related to digital watermarking. It is usually relevant to the ability of detecting changes in multimedia content, especially in images. However, it remains to examine how applications allow different kinds of users to authenticate e-content and conform its originality, and where the conflicts might be found between the application features and the content authentication. This paper aims to introduce an analytical review for digital watermarking used for authentication in different domains covering state-of-the-art concepts, applications, classifications, and design issues. In this paper, we introduce a new classification for digital watermarking techniques and extract the most important design issues of these techniques depending on our reading in a wide range of digital watermarking literatures. Our new classification for digital watermarking techniques can be considered a contribution of this paper. A recent domain utilizes this technique is eLearning system which is a recent tool that produces a new era of education. It allows student/ teacher to learn/teach anywhere at any time. One of the important issues in eLearning environment is content security. The capability to detect changes in eLearning contents has become crucial for many applications in online environment. Thus, we finally present a case study of using digital watermarking techniques for content authentication in eLearning environment taking into account the aspects of our new classification and the design issues extracted for digital watermarking techniques.