International Journal of Advanced Networking and Applications

V. Lokeswara Reddy ¹, P. Asif Ahamad ¹, P. Salman Khan ¹, P. Vivekananda ¹

Affiliations
1 Department of CSE, K.S.R.M. College of Engineering, Kadapa, A.P., IN

Abstract

Digital Watermarking is a technology that embeds information or copyright notices or other verification messages, in machine-readable form, within the content of a digital media file. Watermarks can either be visible or invisible. This technique is better than Digital Signatures and other methods because it does not increase overhead. Digital Watermarking describes methods and technologies that hide information, for example numbers or text, in digital media, such as images, video or audio. The embedding takes place by manipulating the content of the digital data.A digital watermark is a signal permanently embedded into digital data that can be detected or extracted later by means of computing operations in order to make assertions about the data. The watermark is hidden in the host data in such a way that it is inseparable from the data and so that it is resistant to many operations not degrading the host document. Thus by means of watermarking, the work is still accessible but permanently marked. In this new image watermarking scheme the embedding process is done by using Bit replacement technology, which stores multiple copies of the same data that is to be hidden in scrambled form in the cover image. Then, in the recovery process of watermarked image we use Common sense method to recover the closest information from the damaged copies of the data under attack.

Keywords

Cover Image, Secrete Logo, Haar Filter, DWT.

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V. Lokeswara Reddy ¹, A. Subramanyam ², P. Chenna Reddy ³

Affiliations
1 Department of CSE, K.S.R.M. College of Engg., Kadapa, A.P., IN
2 Dept. of CSE, AITS, Rajampet, Y.S.R. (Kadapa) Dist., A.P., IN
3 Dept. of CSE, JNTUCE, Pulivendula, Y.S.R. (Kadapa) Dist., A.P., IN

Abstract

Steganography is derived from the Greek word steganos which literally means “Covered” and graphy means “Writing”, i.e. covered writing. Steganography refers to the science of “invisible” communication. For hiding secret information in various file formats, there exists a large variety of steganographic techniques some are more complex than others and all of them have respective strong and weak points. The Least Significant Bit (LSB) embedding technique suggests that data can be hidden in the least significant bits of the cover image and the human eye would be unable to notice the hidden image in the cover file. This technique can be used for hiding images in 24-Bit, 8-Bit, Gray scale format. This paper explains the LSB Embedding technique and Presents the evaluation for various file formats.

Keywords

Steganography, Least Significant Bit (LSB), GIF, PNG, BMP.

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