Génération de nombres pseudo-aléatoires basée sur des systèmes multi-physiques exotiques et chiffrement d'images PDF Download
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Author: Michaël François
Publisher:
ISBN:
Category :
Languages : fr
Pages : 173
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Book Description
L'utilisation des nombres (pseudo)-aléatoires a pris une dimension importante ces dernières décennies. De nombreuses applications dans le domaine des télécommunications, de la cryptographie, des simulations numériques ou encore des jeux de hasard, ont contribué au développement et à l'usage de ces nombres. Les méthodes utilisées pour la génération des nombres (pseudo)-aléatoires proviennent de deux types de processus : physique et algorithmique. Dans cette thèse, deux classes de générateurs basés sur des principes de mesures physiques et des processus mathématiques sont présentées. Pour chaque classe deux générateurs sont présentés. La première classe de générateurs exploite la réponse d'un système physique qui sert de source pour la génération des séquences aléatoires. Cette classe utilise aussi bien des résultats de simulation que des résultats de mesures interférométriques pour produire des séquences de nombres aléatoires. La seconde classe de générateurs est basée sur deux types de fonctions chaotiques et utilise les sorties de ces fonctions comme indice de permutation sur un vecteur initial. Cette thèse s'intéresse également aux systèmes de chiffrement pour la protection des données. Deux algorithmes de chiffrement d'images utilisant des fonctions chaotiques sont proposés. Ces Algorithmes utilisent un processus de permutation-substitution sur les bits de l'image originale. Une analyse approfondie basée sur des tests statistiques confirme la pertinence des cryptosystèmes développés dans cette thèse
Author: Michaël François
Publisher:
ISBN:
Category :
Languages : fr
Pages : 173
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Book Description
L'utilisation des nombres (pseudo)-aléatoires a pris une dimension importante ces dernières décennies. De nombreuses applications dans le domaine des télécommunications, de la cryptographie, des simulations numériques ou encore des jeux de hasard, ont contribué au développement et à l'usage de ces nombres. Les méthodes utilisées pour la génération des nombres (pseudo)-aléatoires proviennent de deux types de processus : physique et algorithmique. Dans cette thèse, deux classes de générateurs basés sur des principes de mesures physiques et des processus mathématiques sont présentées. Pour chaque classe deux générateurs sont présentés. La première classe de générateurs exploite la réponse d'un système physique qui sert de source pour la génération des séquences aléatoires. Cette classe utilise aussi bien des résultats de simulation que des résultats de mesures interférométriques pour produire des séquences de nombres aléatoires. La seconde classe de générateurs est basée sur deux types de fonctions chaotiques et utilise les sorties de ces fonctions comme indice de permutation sur un vecteur initial. Cette thèse s'intéresse également aux systèmes de chiffrement pour la protection des données. Deux algorithmes de chiffrement d'images utilisant des fonctions chaotiques sont proposés. Ces Algorithmes utilisent un processus de permutation-substitution sur les bits de l'image originale. Une analyse approfondie basée sur des tests statistiques confirme la pertinence des cryptosystèmes développés dans cette thèse
Author: Nabil H. Mustafa
Publisher: American Mathematical Society
ISBN: 1470461560
Category : Mathematics
Languages : en
Pages : 251
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Book Description
Understanding the behavior of basic sampling techniques and intrinsic geometric attributes of data is an invaluable skill that is in high demand for both graduate students and researchers in mathematics, machine learning, and theoretical computer science. The last ten years have seen significant progress in this area, with many open problems having been resolved during this time. These include optimal lower bounds for epsilon-nets for many geometric set systems, the use of shallow-cell complexity to unify proofs, simpler and more efficient algorithms, and the use of epsilon-approximations for construction of coresets, to name a few. This book presents a thorough treatment of these probabilistic, combinatorial, and geometric methods, as well as their combinatorial and algorithmic applications. It also revisits classical results, but with new and more elegant proofs. While mathematical maturity will certainly help in appreciating the ideas presented here, only a basic familiarity with discrete mathematics, probability, and combinatorics is required to understand the material.
Author: Michael Drmota
Publisher: Springer Science & Business Media
ISBN: 3211753575
Category : Mathematics
Languages : en
Pages : 466
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Book Description
The aim of this book is to provide a thorough introduction to various aspects of trees in random settings and a systematic treatment of the mathematical analysis techniques involved. It should serve as a reference book as well as a basis for future research.
Author: Philippe Flajolet
Publisher: Cambridge University Press
ISBN: 1139477161
Category : Mathematics
Languages : en
Pages : 825
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Book Description
Analytic combinatorics aims to enable precise quantitative predictions of the properties of large combinatorial structures. The theory has emerged over recent decades as essential both for the analysis of algorithms and for the study of scientific models in many disciplines, including probability theory, statistical physics, computational biology, and information theory. With a careful combination of symbolic enumeration methods and complex analysis, drawing heavily on generating functions, results of sweeping generality emerge that can be applied in particular to fundamental structures such as permutations, sequences, strings, walks, paths, trees, graphs and maps. This account is the definitive treatment of the topic. The authors give full coverage of the underlying mathematics and a thorough treatment of both classical and modern applications of the theory. The text is complemented with exercises, examples, appendices and notes to aid understanding. The book can be used for an advanced undergraduate or a graduate course, or for self-study.
Author:
Publisher:
ISBN:
Category : Software compatibility
Languages : en
Pages : 188
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Book Description
Author: Simon Denny
Publisher:
ISBN: 9788867490714
Category : Art
Languages : en
Pages : 0
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Book Description
"Simon Denny's new body of work for Portikus ranks among the most ambitious the artist has developed to date. Over the period of one year, the artist researched and developed an intricate project that has grown to considerable dimensions -- both physically and in terms of its critical content. For two months, the monumental gallery space is turned into an homage to technology, communication, and the relentless need for innovation. Simon Denny has produced an embracing and multi-faceted installation that functions as a documentary of the South Korean technology giant Samsung and its global success story. The exhibition's title, "New Management", refers to the legendary management philosophy that Lee Kun-hee, Chairman of the Samsung Group, infamously introduced in the early nineties."--Publisher's website.
Author: Wyndham Hulme
Publisher: Legare Street Press
ISBN: 9781022043336
Category : History
Languages : en
Pages : 0
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Book Description
Wyndham Hulme offers two lectures on the history of statistical data and its significance in shaping societies and civilizations. He discusses the role of statistical evidence in understanding social needs and scientific inquiry. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Author: Catherine Malabou
Publisher: SUNY Press
ISBN: 1438439555
Category : Philosophy
Languages : en
Pages : 373
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Book Description
Elaborates the author’s conception of plasticity by proposing a new way of thinking through Heidegger’s writings on change.
Author: Boris Groys
Publisher: Verso Books
ISBN: 178478348X
Category : Art
Languages : en
Pages : 211
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Book Description
In the early 20th century, art and its institutions came under critique from a new democratic and egalitarian spirit. In an age of secularism and materialism, artworks would be understood as merely things among other things. This meant an attack on the techniques of realism, and the traditional mission of the museum, both designed shield a small class of objects from the entropic fate awaiting everything else-and the development of an approach that Boris Groys calls "direct realism": an art that would not produce objects, but practices that could enter the flow of time to live and die like the rest of us. But for more than a century now, every advance in this direction has been quickly followed by new means of preserving art's distinction. In this major new work, Groys, one of the world's leading art theorists, charts the paradoxes produced by this tension, which continues to structure the production and reception of new art. The internet, the latest medium through which artists have attempted to disavow this special status, inverts the most notorious consequence of early modernist developments. If the techniques of mechanical reproduction gave us objects without aura, digital production generates aura without objects, transforming all its materials into vanishing markers of the transitory present.
Author: Wim Delvoye
Publisher: Rectapublishers
ISBN:
Category : Art
Languages : en
Pages : 152
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Book Description
Borrowing its name from the ancient sewer in Rome, Belgian conceptualist Wim Delvoye's new and improved "Cloaca" is a room-sized shit-making machine whose bowels process two meals a day, serving up a mouthful of complex themes: scatalogy and disgust, high and low culture, man as machine and vice-versa, and the inversion of art semiotics. Many of these same concerns are processed in Delvoye's other work, like the life-sized carved walnut replica of a cement truck, the wood cabinet stocked with 32 circular saw blades painted with scenes in Delft China blue, and a herd of pigs tatooed by Antwerp's finest needle-men. Feces and other anal subjects are parsed in accompanying essays by such luminaries as Milan Kundera, Gerardo Mosquera, Dan Cameron, Georges Bataille and Salvador Dali.
