Journal ArticleDOI
Spread spectrum image steganography
TLDR
A new method of digital Steganography, entitled spread spectrum image steganography (SSIS), which hides and recovers a message of substantial length within digital imagery while maintaining the original image size and dynamic range.Abstract:
We present a new method of digital steganography, entitled spread spectrum image steganography (SSIS). Steganography, which means "covered writing" in Greek, is the science of communicating in a hidden manner. Following a discussion of steganographic communication theory and review of existing techniques, the new method, SSIS, is introduced. This system hides and recovers a message of substantial length within digital imagery while maintaining the original image size and dynamic range. The hidden message can be recovered using appropriate keys without any knowledge of the original image. Image restoration, error-control coding, and techniques similar to spread spectrum are described, and the performance of the system is illustrated. A message embedded by this method can be in the form of text, imagery, or any other digital signal. Applications for such a data-hiding scheme include in-band captioning, covert communication, image tamperproofing, authentication, embedded control, and revision tracking.read more
Citations
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Proceedings ArticleDOI
Evaluating the optimal probability distribution for steganography under zero-error conditions
TL;DR: The optimal distribution analytically is determined and a graphical representation of the variation of the amount of information with signal-to-noise ratio when the size of the alphabet, Q, varies is provided.
Book ChapterDOI
Hiding Data in JPEG Using in-DQT Technique
TL;DR: By using in-DQT technique on standard JPEG test images for cover files with up to 24 bytes of message, results show that steganography image with minimal acceptable image distortion is produced.
A Steganographic Method by Pixel-Value Differencing and Exploiting Modification Direction
TL;DR: The experimental results show that the proposed image steganographic scheme is capable of providing a great payload capacity, and the image quality of the embedded image is better than PVD for a gray-level image.
Proceedings ArticleDOI
Formal Analysis of GM Multi-party Contract Signing Protocol
TL;DR: In this article, the authors proposed a formal protocol model that includes infinitely many signatories and contract texts signing simultaneously, formalize cryptographic primitives and protocol arithmetic, consider composite attacks of the dishonest signatory and the external intruder, clarify the behavior of dishonest signatories, and do great work about protocol attack model.
References
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Journal ArticleDOI
De-noising by soft-thresholding
TL;DR: The authors prove two results about this type of estimator that are unprecedented in several ways: with high probability f/spl circ/*/sub n/ is at least as smooth as f, in any of a wide variety of smoothness measures.
Book
Fundamentals of digital image processing
TL;DR: This chapter discusses two Dimensional Systems and Mathematical Preliminaries and their applications in Image Analysis and Computer Vision, as well as image reconstruction from Projections and image enhancement.
Journal ArticleDOI
Error bounds for convolutional codes and an asymptotically optimum decoding algorithm
TL;DR: The upper bound is obtained for a specific probabilistic nonsequential decoding algorithm which is shown to be asymptotically optimum for rates above R_{0} and whose performance bears certain similarities to that of sequential decoding algorithms.
Journal ArticleDOI
Secure spread spectrum watermarking for multimedia
TL;DR: It is argued that insertion of a watermark under this regime makes the watermark robust to signal processing operations and common geometric transformations provided that the original image is available and that it can be successfully registered against the transformed watermarked image.