Catálogo de publicaciones - libros

Watermarking has been used for digital rights protection over different types of contents on the Web. Since XML data is widely used and distributed over the Internet, watermarking XML data is of great interest. In this paper, we present a new watermarking scheme to embed different fingerprints in XML data. The fingerprint can be used to trace illegal distributors. We also take into consideration that XML data usually contains categorical elements which can’t tolerant much modification, our scheme attempts to reduce modifications without bringing down the robustness of the fingerprint. Modifications could be reduced by choosing different patterns to insert. The experiments show that our scheme is effective to make less distortion to the original data and the fingerprint maintains the same robustness level at the same time.

With the fast development of the Web, a web document source periodically broadcasts its document to multiple users. The web document could contain the sensitive information and it should be sent to users who have an authority accessing the sensitive information. In a well-known method, called , the sensitive information is separated from the document, and then, it is encrypted. Therefore, reconstruction of a document is required when the document is shown to a user. For the reconstruction, it is very important that we identify the location of decrypted information effectively and efficiently. In this paper, we propose a labeling scheme to support the fast reconstruction of document, based on the use of encryption techniques. The proposed labeling scheme supports the inference of structure information in any portion of the document. In the experimental results, our labeling scheme shows an efficiency in searching for the location of decrypted information.