Security. INTRODUCTION The advancement in digital technology with the advent of computers and internet technology has brought a revolution by transforming the world into a ⦠Steganography is the art and science of hiding information by embedding messages within other, seemingly harmless messages. In contrast, security of the hash function can be obtained by generating the hash value based on a secret key. An EPR that includes images, diagnostic reports, etc. Firstly, a pixel is taken as an embeddable pixel (EP)or a non-embeddable pixel (NEP) according to its relations with the left and right neighbors, and then the EP is substituted with a new pixel consisting of flag-bits, offset-bits and embedding bits, without the difference histogram and expansion processes. capacity, imperceptibility and the human perceptual system, security and attacks, watermarking systems and implementations, and integration of digital watermarking in digital rights management. The blocks of two images which have similar Standard Deviation values are selected to execute the block pairing-substitution. A robust, imperceptible, and secure dual image watermarking technique for e-healthcare applications was proposed in this chapter. SSIM is a newer measurement tool that is designed based on three factors i.e. We also analyzed the effect of secret data type on the quality of stego image. better security and imperceptibility. Image steganography [ 3 â 7 ] is a very interesting field because of the imperceptible way of hiding data due to the resolution of the eye. Figure 8.10 shows the PESQ-MOS result. The bigger thrust today is the application of advanced audio hiding methods that work on smartphones, providing steganography/data hiding on the go. Steganography hides the data in a cover media such. Simulation results evaluated the robustness/efficiency of the transmission with various attacking scenarios and various bandwidth variations. Color images were chosen as container images because human vision is more sensitive to color changes than grayscale changes. Text steganography is a challenging task as slight modification in text file can be identified. Found inside – Page 94Imperceptibility: The imperceptibility means invisibility of a steganography algorithm. Because it is the first and foremost requirement, the strength of steganography lies in its ability to be unnoticed by the human eye. Several studies have conducted for medical watermarking applications. Found inside – Page 25Its purpose is to make communication imperceptible. The steganography problem is also known as the prisoners' problem formulated by Simmons [1]. The most important property of any steganography is statistical imperceptibility. Found inside – Page 425Steganography is the act of covert communications, which means that only the sender, Alice, and receiver, Bob, are aware of the secret ... In Chapter 1, we defined watermarking as the practice of imperceptibly altering a Work to embed ... A Steganography System consists of two functions: embedding and extraction. imperceptibility in comparison to other existing schemes. Next, imperceptibility evaluation of selected temporal, transform and coded domain steganography tools and methods is discussed. Steganography also takes a real challenge in the field of security through data concealment. Spectrograms of carrier speech and stego speech. other methods with respect to steganography aspects: imperceptibility, capacity (i.e., payload) and robustness (resistance to attacks); especially against visual attack. Steganography is defined as the hiding of an information within another source so that the presence of the hidden ... parameters i.e. In steganography, secret message is the data that sender wishes to remain confidential Figure 8.12. We also expect improvement in hiding methods that focus on AAC and MP3 files that will make slight modification to the encoded compressed data that will increase payload capacity without sacrificing robustness. Additionally, the changes based on the histogram are more noticeable in LSB and CRT than in PVD. Also in this chapter, an image watermarking scheme using hybridization of discrete cosine transform-singular value decomposition and a GA is developed and analyzed for the security of medical images for telemedical applications. Steganography is the method of hiding hidden data within a host signal, with imperceptibility, concealment capacity, and retrieved data quality as design criteria. As data hiding detection and forensic techniques have matured, people are creating more advanced stealth methods for spying, corporate espionage, terrorism, and cyber warfare all to avoid detection. International Journal of Computer Applications 138(10):38-43, March 2016. This secret sharing raised a new practicality challenge of human secrecy memorization as well as limited number of users allowed, which have been addressed within this work. The embedding procedure was adopted with an intensity level. A similar approach has been discussed in [14]. However, these metrics exhibit poor correlation with the visual quality as perceived by humans. These methods used different datasets for evaluation. To solve the problems such as obvious speckle noise and serious spectral distortion when existing fusion methods are applied to the fusion of optical and SAR images, this paper proposes a fusion method for optical and SAR images based on Dense-UGAN and Gram–Schmidt transformation. All existing watermarking algorithms that are not secure cannot be used for copyright protection. Some important aspects of steganography techniques are ⦠Steganography works by replacing bits of useless or unused data in regular computer files (such as graphics, sound, text, HTML, or even floppy disks ) with bits of different, invisible information.
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