Sciences exist to demonstrate the fundamental order underlying nature. Chaos/complexity theory is a novel and amazing field of scientific inquiry. Notions of our everyday experiences are somehow in connection to the laws of nature through chaos/complexity theory’s concerns with the relationships between simplicity and complexity, between orderliness and randomness (Retrieved from http://www.inc...

With the development of computer network technology, people’s requirements for information security is increasing day by day. However, classical encryption technology has defects small key space and easy crack. The problems image in protecting private content need solving urgently. As a new type quantum generator, random walk large space. Compared with walk, computing speed are significantly im...

Linear Prediction (LP) analysis has proven to be very powerful and widely used method in speech analysis and synthesis. Synthesis by LP-based approach is carried by exciting an allpole model (whose parameters are derived by LP analysis). Synthesis is carried by using mixed excitation source consisting of a sequence of impulses for voiced regions and white-noise source for unvoiced regions. In t...

Speech scrambling techniques are used to scramble clear speech into unintelligible signal in order to avoid eavesdropping. . Analog scramblers are intended in applications where the degree of security is not too critical and hardware modifications are prohibitive due to its high cost .The residual intelligibility of the speech signal can be reduced by reducing correlation among the speech sampl...

Cryptography as an ancient subject is endowed with new vigor by chaos theory. Cryptography protects the security of today’s ubiquitous Internet communication, which as an open network is vulnerable to attack. In this paper, chaos-based cryptography is surveyed with focus on designing chaotic pseudo-random number generators (CPRNGs) for stream cipher and their chip implementation. The properties...

The paper proposes a new image encryption scheme based on chaotic encryption. It provides a fast encryption algorithm based on coupled chaotic map. The image is encrypted using a pseudorandom key stream generator. The image is partially encrypted by selecting most important components of image. To obtain most important components of an image, discrete wavelet transform is applied.

We propose a chaotic encryption method based on Cellular Automata(CA), specifically on the family called the “Life-Like” type. Thus, the encryption process lying on the pseudo-random numbers generated (PRNG) by each CA’s evolution, which transforms the password as the initial conditions to encrypt messages. Moreover, is explored the dynamical behavior of CA to reach a “good” quality as PRNG bas...

A chaotic noise is one of the most important implements for information processing such as neural networks. It has been suggested that chaotic neural networks have high performance ability for information processing. In this paper, we report two designs of a compact chaotic noise generator for large integration circuits using CMOS technology. The chaotic noise is generated using map chaos. We d...

During last one and half decade an interesting relationship between chaos and cryptography has been developed, according to which many properties of chaotic systems such as: ergodicity, sensitivity to initial conditions/system parameters, mixing property, deterministic dynamics and structural complexity can be considered analogous to the confusion, diffusion with small change in plaintext/secre...