In this article, we propose a novel integrated approach to quantitative semi-fragile authentication of JPEG2000 images under a generic framework which combines ECC and PKI infrastructures. Firstly acceptable manipulations (e.g., re-encoding) which should pass authentication are defined based on considerations of some target applications. We propose a unique concept of lowest authenticable bit r...

THE EUROPEAN JOURNAL OF RESPIRATORY MEDICINE VOL I ISSUE I Several clinical prediction have been developed to categorised such patients as Geneva or Well’s scores; however the ability to accurately determine the pretest probability of PE appears to increase with clinical experience. [4] Accurate diagnosis of acute PE may be difficult on these bases, because of non-specificity of not only the cl...

In 1999, when most of the computer industry’s cautionary buzz centered on finding and fixing Y2K flaws, a small group of MITRE engineers began work on the Common Vulnerabilities and Exposures dictionary. Prior to CVE, no standard nomenclature existed for network security holes. In fact, the security landscape was rife with different names for the same vulnerability, as vendors strove to differe...

JPEG 2000, a new international standard for still image compression, is discussed at length. A high-level introduction to the JPEG-2000 standard is given, followed by a detailed technical description of the JPEG2000 Part-1 codec. Keywords—JPEG 2000, still image compression/coding, standards.

Most of the image compression techniques currently available were designed mainly with the aim of compressing continuous-tone natural images. However, if this assumption is not verified, such as in the case of histogram sparseness, a degradation in compression performance may occur. In this paper, we analyze the impact of histogram sparseness in three state-of-the-art lossless image compression...

Source traac streams as well as aggre-gated traac ows often exhibit long-range-dependent (LRD) properties. In this paper, we model each traac stream component through the multiplicative multi-fractal counting process traac model. We prove that the superposition of a nite number of multiplicative multifractal traac streams results in another multi-fractal stream. This property makes the multifra...