Instal : Jurnal Komputer p-ISSN: 2085-5702 e-ISSN: 2808-683X Edition : Volume 13 Number 02 Available online at https://journalinstal.cattleyadf.org/index.php/Instal/index Application Of The Concept Of Singular Value Decomposition For The Making Of Watermark In Documents Sinar Sinurat 1 , Edward R Siagian 2 Universitas Budidarma, Indonesia Email : sinurat.sin@gmail.com 1 edward.siagian@gmail.com 2 Received : 3 October 2021 Revised : 26 November 2021 Accepted : 29 November 2021 © 2021 The Author: Published by. Cattleya Darmaya Fortuna Abstrak Watermark is a part of steganography that is used by many users in electronic and non-electronic documents. Watermark certainly does not guarantee the safe use or modification of the document, but only the legitimacy of ownership of the document. Watermarking is a part of steganography that is used by many users in electronic and non-electronic documents. Watermarking certainly does not guarantee the safe use or modification of the document, but only the legitimacy of ownership of the document. Establishing a digital watermark will improve the owner's document security. Hiding a label by inserting datum bits in the image segment using Singular Value Decomposition (SVD), as a part of Watermarking. Watermark domains are digital documents in the form of videos, images, text, sound. Watermarking applications built by applying singular value decomposition to numbers Keywords: Singular Value Decompostion, Image, Document, Robustness, Watermark. Introduction As the use of watermarks is only considered an art in document writing, but in quotes from several journals, there are many other opinions stating, among others : Watermark is a technique of hiding data or information into other data to be "boarded" (host data), but people are not aware of the presence of additional data in the data host[1]. Applying Singular Value Decomposition (SVD) on the host image to determine the modified singular value by adding a watermark, then SVD is reused in the resulting matrix to calculate the modified singular value[2]. If a document that on the internet is in the form of text or images, if there is no copyright for the digital work, it will open up opportunities for copyright infringement of other people's works[3]. Based on the description above that watermarking is not only an art but part of security. The security of the document in question is not how strong the security is, but if the watermark visible, it will allow users not to think about transferring copyright from the original document maker. Objectives and benefits Based on the study described in the background, the specific objectives of this research are as follows : Understand the process of inserting a watermark on an image. Apply SVD (Singular Value Decomposition) method to insert watermark on digital image. Build a prototype application for embedding a watermark on a digital image. Research Urgency The urgency of this research is as follows : Following up on the problem description on the background, the urgency of research related to the