The protection of confidential image data from unauthorized access is an important area of research in network communication. This paper presents a high-level security encryption scheme for gray scale images. The gray level image is first decomposed into binary images using bit scale decomposition. Each binary image is then compressed by selecting a good scanning path that minimizes the total n...

A deterministic BIST scheme is presented which requires less hardware overhead than pseudo-random BIST but obtains better or even complete fault coverage at the same time. It takes advantage of the fact that any autonomous BIST scheme needs a BIST control unit for indicating the completion of the self-test at least. Hence, pattern counters and bit counters are always available, and they provide...

Most cryptographic services and information security protocols require a dependable source of random data; pseudorandom generators are convenient and efficient for this application working as one of the basic foundation blocks on which to build the required security infrastructure. We propose a modification of a previously published matricial pseudorandom generator that significantly improves p...

Pseudo random numbers, generated recursively by deterministic rules, represent one of important ingredients in algorithms for numerical simulations such as molecular dynamics and of Monte Carlo simulations, widely used in physics, chemistry, material science and cryptography [1]. It is a great challenge to design random number generators (RNGs) producing pseudo random numbers that behave as rea...

Random number generation is an integral part of strong cipher systems. If a pseudo-random sequence can be predicted with better than chance probability then the generator is considered to be cryptographically weak. This paper deals with next bit prediction of pseudo-random binary sequences generated by Linear Feedback Shift Register (LFSR) and LFSR-based pseudo-random bit generators (PRBG), usi...

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...

We propose a new approach to nondeterministic random number generation. In theory, the randomness originated from the uncorrelated nature of consecutive laser pulses with Poissonian photon number distribution and that of the consecutive single photon detections is used to generate random bit. In experiment, von Neumann correction method is applied to extract the final random bit. This method is...

The use of Radio Frequency Identification (RFID) advancement is turning out to be rapidly transversely over an extensive variety of business undertakings. Engineers apply the development not simply in customary applications, for instance, asset or stock after, also in security organizations, electronic travel papers and RFID-embedded card. In any case, RFID development moreover brings different...

The use of Radio Frequency Identification (RFID) advancement is turning out to be rapidly transversely over an extensive variety of business undertakings. Engineers apply the development not simply in customary applications, for instance, asset or stock after, also in security organizations, electronic travel papers and RFID-embedded card. In any case, RFID development moreover brings different...

We present the construction of a pseudorandom generator, that we call the Bit-Search Generator (BSG), based on a single input sequence. The construction is related to the so-called Self-Shrinking Generator which is known for its simplicity (conception and implementation-wise) linked with some interesting properties. After presenting the general running, we give a description of the BSG by using...