1 INTRODUCTION
With the rapid develpment in the field of computer science, internet has reached to mass and is continuously gaining popularity due to which it has become very easy to share things such as images, videos, documents, etc. But this ease comes at the cost of information security. For these reasons and many others, digital image watermarking has emerged as the appropriate solution for these cases.
The image watermarking system consists of an embedder and a detector, as illustrated in Figure 1. The embedder takes two inputs. One is the payload or watermark, and the other is the cover work or the host image. The output of the embedder is typically transmitted or recorded. Later that work is presented as an input to the detector. Most detectors try to determine whether a payload is present, and if so, output the message encoded by it.
1.1 BASIC MODEL OF DIGITAL IMAGE WATERMARKING
The basic model of image watermarking consists of three parts as described in Figure 2, they are:
Embedding: In this process the watermark is embedded into the host image with a certain technique.
Attack: This is the insecure part of the watermarking life cycle as it comprises of either transfer of the image or the storage of the image. If in between this process the image is altered then it is termed as attack.
Detection: In this, detector detects the watermark from the watermarked image which is generated at the time of embedding phase. This part is also insecure if proper techniques are not applied to make it secure.
1.2 PROPERTIES OF DIGITAL IMAGE WATERMARKING
The main requirements for the watermark are as follows:
A) Robustness: The robustness is the ability of detecting the watermark after some signal proc...
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...r watermark embedding.
REFERENCES
[1] Ingemar J. Cox, Mathew L. Miller, Jeffrey A. Bloom, Jessica Fridrich, and Ton Kalker, Digital Watermarking and Steganography, Morgan Kaufmann Publishers, 2008.
[2] David Kilburn. Dirty linen, dark secrets. Adweek, 1997.
[3] A. M. Zeki and A. A. Manaf, A novel digital watermarking technique based on ISB (Intermediate Significant Bit), World Academy of Science, Engineering and Technology, vol. 50, pp. 989-996, 2009.
[4] Z. J. Yong, L. D. Hong, L. J. Zeng, and J. Miao, A DCT-BASED Digital Watermarking Algorithm for Image, in Industrial Control and Electronics Engineering (ICICEE), 2012 International Conference, pp. 1217-1220, 2012.
[5] S. Craver, N. Memon, B. Yeo, and M. Young, On the invertibility of invisible watermarking techniques. Proc. Of the IEEE Int. Conf. On Image Processing, Vol. 1, p. 540-543, 1997.
apace spread across Europe. Watermarking can be measured as special techniques of steganography where one message is embedded in another and the two messages are related to each other. Digital watermarking is similar to watermarking technique which allows an individual to add exclusive rights notices or other verification messages to digital media. Image authentication’s one of the applications of digital watermarking, which is used for authenticating the digital images. A digital watermark is a kind
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bandwidth, power level in decibels (dB), and voltage level. Audio watermarking With the rapid development in computer technology, large number of medias are being converted to digital form and with the use of internet technology it has become very
copying and redistribution. But sometimes it is insufficient to protect the multimedia data. Here is the actual use of the digital watermarking technology. Watermarking is a technology in which a hiding a digital data inside the host signal. Thus it will help to verifying the authority or integrity of the host signal. The traditional two party digital rights management system contains only owner and consumer. But it is insufficient to satisfy today’s business needs and content delivery. Hence, multiparty
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classified as audio, video, text, image and network steganography. In this paper we have analyzed various data hiding techniques in encrypted images. Keywords: steganography, data hiding, security. I. INTRODUCTION In modern time data hiding is associated with digital forms such as cryptography, steganography and watermarking. Fig 1. Steganography Concepts Cryptography is obscuring the content of the message, but not the communication of the message. Watermarking attempts to add sufficient metadata
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network, security of such image data is important.This work proposes a novel scheme for the security of such images by the method of separable reversible data hiding in encrypted images. In the first phase, a content owner encrypts the original uncompressed image using an encryption key. Then, a data-hider may compress the least significant bits of the encrypted imageusing a data-hiding key to create a sparse space to accommodate some additionaldata.With an encrypted image containing additional data
objects such as digital images, audio,video or text files.The other area of steganography is a copyright marking where the message is inserted to copyright over a document. steganography and watermarking portray routines to insert data straightforwardly into a bearer signal. Data stowing away in sound signs is increasing boundless significance for secure correspondence of data, for example, clandestine front line and managing an account exchanges by means of open sound
integration One of its application is in Cryptography such as “ Shamir's secret sharing scheme”. It is appropriate for back-of-the-envelope calculations. It is uses in Improving the Low Resolution Images Accuracy in Human Face Recognition. It is uses in Contrast Based Color Watermarking In Wavelet Domain. It is uses in Learning of Neural Network. It is uses in Data Compression. 5.APPLICATION OF LAGRANGE POLYNOMIAL INTERPOLATION Application: Secure Message Transmission
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