Watermarking for Security in Database

Watermarking technology is used to embed copyright information in objects such as images, audio, video and databases. The increasing use of relational database systems in many real-life applications creates the need for database watermarking systems for protection of database. As a result, watermarking relational database system deals with the legal issue of copyright protection of database system. There are different types of databases like, Numerical and Categorical Databases. Working with numerical data is easier as compared to categorical databases which is much harder to work with. This report addresses a unique, robust copyright protection scheme for Relational Database. Watermark (Characteristic code) is a binary string calculated through the characteristic operation on the original database. A watermark is called robust if it resists a designated class of transformations. Robust watermarks may be used in copy protection applications to carry copy and access control information. The algorithm correlates characteristics according to the content of the databases, which can resist invertibility attack efficiently.Invertibility attack on database is being considered in this paper

Blind Adaptive Watermarking Based on Wavelet Transform and HVS

This paper proposes a novel blind image adaptive watermarking scheme in Discrete Wavelet Transform (DWT) domain for copyright protection or robust tagging applications. Watermarking scheme effectively utilizes the contrast sensitivity model of Human Visual System (HVS) to embed the watermark adaptively without degradation of the original image. Watermark can be extracted without referring to the original image. Simulation results show the robustness of the proposed algorithm against various attacks

Implementasi dan Analisis Blind Watermarking Citra Digital dengan Skema CDMA pada Domain Wavelet

ABSTRAKSI: Seiring pertumbuhan dari sistem multimedia memberikan kemudahan dalam penyebaran konten multimedia tersebut, sehingga perlindungan terhadap penyebaran konten, seperti multimedia copyright protection, menjadi persoalan penting. Untuk penyelesaian terhadap masalah ini salah satunya adalah dengan Digital watermarking.Tugas akhir ini mengusulkan implementasi sistem blind watermarking pada citra digital dengan menggunakan skema Code Division Multiple Access (CDMA) pada domain Discrete Wavelet Transform (DWT). DWT merupakan sebuah model yang lebih akurat pada Human Visual System (HVS) dan merupakan sebuh lingkungan yang menjanjikan untuk menerapkan robust watermarking. Sedangkan keuntungan dari CDMA adalah watermark yang direlasikan dengan Pseudo-random Noise (PN Key) sebelum disisipkan pada subband LH dan HL dari citra host yang didekomposisi 1 tingkat. Pengimplementasian dengan skema ini mampu meningkatkan robustness dengan sedikit pengaruh terhadap kualitas citra. Hasil dari pengujian terhadap sistem yang dibangun menunjukkan bahwa skema ini memiliki imperceptiblity yang baik, pada normal copyright hingga copyright dengan ukuran 40x150 pixel, dan juga robust terhadap serangan lossy image compression dan Additive White Gaussian Noise (AWGN).Kata Kunci : blind watermarking, DWT, pseudo-random noise, skema CDMA.ABSTRACT: Along with the growth of the multimedia system, it provides ease in the distribution of multimedia content, thus the protection of distributed content, such as multimedia copyright protection, becomes an important issue. One of many solution for this problem is digital watermarking.This final project proposes an implementation of blind digital image watermarking by using Code Division Multiple Access (CDMA) scheme on Discrete Wavelet Transform (DWT) domain. DWT is an accurate model of the Human Visual System (HVS) and a promising environment to apply robust watermarking. While the advantages of CDMA is a watermark that related with Pseudo-random Noise (PN Key) before being embedded in the LH and HL subband of 1-lv decomposed of host image. Through implementation of this scheme is able to increase robustness with minimal impact on image quality. The testing results, from the system had built, demonstrated that the scheme has a good imperceptiblity for the normal copyright until copyright with 40x150 pixels, and also robust against lossy image compression and Additive White Gaussian Noise (AWGN).Keyword: blind watermarking, DWT, pseudo-random noise, CDMA schem

A novel multipurpose watermarking scheme capable of protecting and authenticating images with tamper detection and localisation abilities

Technologies that fall under the umbrella of Industry 4.0 can be classified into one of its four significant components: cyber-physical systems, the internet of things (IoT), on-demand availability of computer system resources, and cognitive computing. The success of this industrial revolution lies in how well these components can communicate with each other, and work together in finding the most optimised solution for an assigned task. It is achieved by sharing data collected from a network of sensors. This data is communicated via images, videos, and a variety of other signals, attracting unwanted attention of hackers. The protection of such data is therefore pivotal, as is maintaining its integrity. To this end, this paper proposes a novel image watermarking scheme with potential applications in Industry 4.0. The strategy presented is multipurpose; one such purpose is authenticating the transmitted image, another is curtailing the illegal distribution of the image by providing copyright protection. To this end, two new watermarking methods are introduced, one of which is for embedding the robust watermark, and the other is related to the fragile watermark. The robust watermark's embedding is achieved in the frequency domain, wherein the frequency coefficients are selected using a novel mean-based coefficient selection procedure. Subsequently, the selected coefficients are manipulated in equal proportion to embed the robust watermark. The fragile watermark's embedding is achieved in the spatial domain, wherein self-generated fragile watermark(s) is embedded by directly altering the pixel bits of the host image. The effective combination of two domains results in a hybrid scheme and attains the vital balance between the watermarking requirements of imperceptibility, security and capacity. Moreover, in the case of tampering, the proposed scheme not only authenticates and provides copyright protection to images but can also detect tampering and localise the tampered regions. An extensive evaluation of the proposed scheme on typical images has proven its superiority over existing state-of-the-art methods