Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/13800
Title: Watermarking of relational databases
Authors: SONG YAXIAO
Keywords: watermarking of relational databases; fingerprinting; collusion-resistant watermarking; collusion attacks; invertible (lossless) watermarking
Issue Date: 26-Mar-2004
Source: SONG YAXIAO (2004-03-26). Watermarking of relational databases. ScholarBank@NUS Repository.
Abstract: Due to increasing concerns about data piracy, digital rights management of databasesis becoming an extremely important area of research. There have recently been somepioneering works in this area that help establish ownership of relational data. Inthis thesis, we firstly consider the more general buyer-seller scenario where an ownerof the database sells it to many different customers. For this case, obviously it isnecessary to individually identify each copy of the data sold so as to precisely andreliably identify the source in case of piracy. Also, such a scheme would be susceptibleto collusion attacks in which a set of legitimate buyers collude together to illegallytamper the watermark. We present a novel Individualized Watermarking scheme forthe need. Secondly, we propose an Invertible Watermarking scheme for protectingprecision-critical databases, where there is a need to reverse the original data. Ex-periments conducted on a commercial database system confirm that the proposedmethods can survive a wide variety of attacks. Moreover, Incremental Watermarkingfor the second scenario is very effective when normal updates of the databases arefrequently conducted.
URI: http://scholarbank.nus.edu.sg/handle/10635/13800
Appears in Collections:Master's Theses (Open)

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