In order to improve the security of digital image transmission process, and accelerate the rate of information transfer, a novel spatial-chaos-based self-adapting image encryption scheme is proposed in this paper. Firstly, to obtain corresponding scrambling image, the spatial location of pixels of a revised digital image is shuffled by using extended 2D cat map. Then, two-dimensional pseudo-ran...

Image scrambling is used to make images visually unrecognizable such that unauthorized users have difficulty decoding the scrambled image to access the original image. This article presents two new image scrambling algorithms based on Fibonacci p-code, a parametric sequence. The first algorithm works in spatial domain and the second in frequency domain (including JPEG domain). A parameter, p, i...

Voice communication Protection is possible and may be in the future becomes a preferable to view the problem of security of voice communication in term of the classical producing speech ciphering system. The use of different form of speech scramblers have thus been a common approach to voice security. The main aim of this work is to model and simulation a proposed hybrid structure of speech scr...

Based on chaotic sequence and decomposition and recombination of pixel values, a new digital image scrambling algorithm is proposed in the paper. While scrambling image pixel values, this new algorithm is able to change the spatial position of pixel, simultaneously scrambling both position and pixel values. Experiments show that the new algorithm is larger in key space, highly efficient, sensit...

This paper investigates digital data hiding schemes. The concept of information hiding will be explained at first, and its traits, requirements, and applications will be described subsequently. In order to design a digital data hiding system, one should first become familiar with the concepts and criteria of information hiding. Having knowledge about the host signal, which may be audio, image, ...

Several studies contend that the main motivation for scrambling is heaviness. In particular, Yamashita (2002) maintains that scrambling has nothing to do with givenness and that heaviness is the primary factor for scrambling. However, her conclusions count on only 19 examples and she does not distinguish VP-internal scrambling from VP-external scrambling. Thus, it is conceivable that some types...

Peak to average Power Ratio (PAPR) is the major drawback of orthogonal Frequency Division Multiplexing (OFDM) systems. Since OFDM is the indispensable technology for 4G wireless schemes, great attention is given to PAPR reduction. Some of the techniques classified under signal distortion and signal scrambling already existing to meet the needs, but their effectiveness is still a question for re...

In this paper, I address the relation between scrambling and morphological Case from an optimality-theoretic perspective. Based on empirical evidence from German, Russian, and Bulgarian, and conceptual evidence involving issues of parametrization, I give arguments against the traditional view that scrambling presupposes morphological Case. The remaining two options are (a) and (b). (a) There is...