期刊名称：International Journal of Computer Trends and Technology
电子版ISSN：2231-2803
出版年度：2014
卷号：11
期号：1
页码：13-18
DOI：10.14445/22312803/IJCTT-V11P103
出版社：Seventh Sense Research Group
摘要：The rapid growth of the Internet and related technologies has offered an unpredicted ability to access and redistribute original digital contents. Watermarking techniques have emerged as an important building block that plays a crucial role in addressing the ownership problem. A watermark is a owner information that is securely and robustly embedded into original information such as an text, image, video or audio signal, producing a watermark information. In this paper, it provides mechanism for proof of ownership based on the secure embedding of a robust imperceptible watermark in relational data. This technique is resilient to watermark synchronization errors because it uses a partitioning approach that does not require marker tuples. It is resilient to tuple deletion, alteration and insertion attacks. This approach is used in watermarking database to provide security to owner information and to identify the unique characteristics of relational data and provide desirable properties of a watermarking system for relational data. The watermarking technique can be applied to any database relation having attributes in which few tuples altered based on the threshold value do not affect the database values. This approach ensures that some bit positions of some of the attributes of some of the tuples contain watermark bits. The tuples division is done and after finding the threshold value watermark bits are added for efficient and secure watermark embedding and attacker may not find the original watermarked data. Only if user has access to the private key, then he can decode the database with high probability.
