Ease of deployment of digital images via the internet has both positive and negative, especially for owners of the original digital image. The positive side of the ease of rapid deployment is the owner of the image spread of digital image les into a variety of address sites in the world. While the downside is if there is no copyright that serves as a protector of the image it is easily recognized by the other party OWNER. Watermarking is one solution for protecting copyrights and know the results of digital photographs. With Digital Image Watermarking, digital photo copyrights will be protected generated through the insertion of additional information such as owner information and the authenticity of the digital photo. Least Signicant Bit (LSB) is one of the algorithm is simple and easy to understand. Digital image watermarking insertion into the LSB is run through a desktop application. This application is made to the program language Matlab 7.7.0 (R2008b). The attack on the changing image of the watermark embedding watermark that has been inserted as blurring, sharpening and noise addition.

IMPLEMENTATION OF DIGITAL IMAGE watermarking USING LSB

In order to authenticate the authenticity and integrity of watermark, a fragile watermarking algorithm is proposed for the content authentication of digital media products. First, the watermark is embedded into the least significant bit (LSB) of the pixel of the host image, and then the hash value is generated by the Hash function form the watermark information and is saved the text, Then the watermark hash value is embedded into the image of the carrier. On the authentication side, After extracting the watermark information and the Watermark Digest information, the extracted watermark information is generated by the hash function to generate a new set of watermark summary information, and compared with the extracted watermark information. The experimental results show that the fragile watermarking algorithm can achieve good authentication capability. Introduction The development of network technology and digital multimedia technology brings great convenience to people, but it also brings a series of security problems. With the rapid development of computer technology and the digitalization of information media and the appearance of various image editing software, attackers can tamper with the content of digital image without any effort or trace. There is an old saying in China: "Hearing for the false, seeing for the real", see for themselves is the basis for people to distinguish between authenticity, but the ease of manipulation of multimedia data makes people through the eyes difficult to distinguish the authenticity. Taking digital images as an example, an inadvertent modification of the X-ray may cause misdiagnosis; a photograph of a physical evidence may distort the true face of a legal event if it is maliciously modified; The news website needs to confirm that the published image is true, and so on. Therefore, in this era of information digitalization, how to effectively protect the authenticity and integrity of digital media content becomes a serious realistic problem, and fragile watermarking technology provides an effective way to solve this problem[1,2]. The information hiding algorithm mentioned in document [3] is simple and easy to realize, it is a convenient way to hide secret information quickly, but the security and reliability of this method need to be improved. The method studied in this paper is a fragile watermarking algorithm based on hash function, which is obtained by the combination of digital watermarking technique and cipher technology. Compared with the existing fragile watermarking algorithm based on hash function, this method is better to embed the digest value of watermark information into the carrier image, and solve the problem of the transmission of Watermark Digest information. This further guarantees the authenticity and integrity authentication of the watermark information.

https://www.dpi-proceedings.com/index.php/dtcse/article/viewFile/24543/24176

Design and Implementation of a Completely Fragile Image Algorithm Based on Hash Function

In the process of transmission, the various factors can effect easily the multimedia information. The receiver can't distinguish whether the received multimedia data has been tampered. The fragile watermarking can authenticate the authenticity and integrality of the multimedia data. The paper analyzes the fragile watermarking based on local binary pattern. Experimental results demonstrate that, in a copy-move and splicing forgery, the existing algorithms can’t determine whether a digital image is original or doctored. Keywords—fragile watermarking; local binary pattern; copymove forgery; splicing forgery

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Analysis on the Copy-move and Splicing Forgery of Fragile Watermarking Based on Local Binary Pattern

This paper proposes a (k,n) visual cryptography based on Shamir's secret sharing (VCSSS). Using Shamir's secret sharing, a binary secret image can be shared into n meaningless shares, in order to make the generated shares more like noise images, adding the randomness within the process of sharing. Picking any k shares from n meaningless shares, the secret image can be revealed by using Lagrange interpolation. The main contribution of this paper is that applying Shamir's secret sharing to realize a (k,n) visual cryptography, and this method neither requires code book nor suffers from pixel expansion. Experimental results show VCSSS can realize a (k,n) visual cryptography, and correct decoding rate (CDR) of revealed secret image can be guaranteed.

Rundong Yang

Papers

Design and Implementation of a Completely Fragile Image Algorithm Based on Hash Function

Analysis on the Copy-move and Splicing Forgery of Fragile Watermarking Based on Local Binary Pattern

A (k,n) Visual Cryptography Based on Shamir's Secret Sharing

Analysis on the Copy-move and Splicing Forgery of Fragile Watermarking Based on Local Binary Pattern