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Le Darknet est cette partie d'internet où les communications se veulent anonymes. Il doit sa notoriété aux innombrables activités déviantes qui s'y épanouissent, mais il est bien plus que cela. Le Darknet est complexe et ambivalent. Il forme un espace hétérogène, à la fois sombre et lumineux, où truands, geeks, journalistes, activistes et dissidents côtoient une population tout simplement soucieuse du respect de sa vie privée. C'est cette réalité technique et sociale que ce livre souhaite présenter. Il décrit les technologies fondamentales comme les réseaux pair-à-pair, la cryptographie à clé publique ou les mixnets et détaille l'usage et le fonctionnement des grands environnements anonymes tels Tor, Freenet ou I2P. Il s'attarde sur les cryptomonnaies et les Bitcoins, cette fascinante innovation qui est au cœur des échanges illégaux, mais aussi sur la blockchain qui est à l'origine de nouveaux outils de lutte contre la censure et la surveillance. Le lecteur y croisera les inévitables trafiquants de drogues, des vendeurs de faux papiers ou des tueurs à gages, mais aussi Edward Snowden, WikiLeaks, la communauté homosexuelle africaine, les manifestants iraniens ou encore des dissidents syriens, russes, chinois... Des marchés noirs aux " interrupteurs pour échapper au contrôle " chers à Gilles Deleuze, le Darknet est une réalité complexe et mouvante qui témoigne de l'intimité du lien entre les évolutions techniques et les dynamiques sociales.

Cybercriminalité. --- Utilisation de l'internet. --- Cryptographie à clé publique. --- Poste à poste (Internet) --- Bitcoin. --- Cryptomonnaie. --- Réseaux anonymes (informatique)

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Computer networks --- Computers --- Computer security --- Public key cryptography --- Réseaux d'ordinateurs --- Sécurité informatique --- Cryptographie à clé publique --- Security measures --- Access control --- Sécurité --- Mesures --- Public key infrastructure (Computer security) --- -681.3*D46 --- 005.8 --- Communication systems, Computer --- Computer communication systems --- Data networks, Computer --- ECNs (Electronic communication networks) --- Electronic communication networks --- Networks, Computer --- Teleprocessing networks --- Data transmission systems --- Digital communications --- Electronic systems --- Information networks --- Telecommunication --- Cyberinfrastructure --- Electronic data processing --- Network computers --- Infrastructure, Public key (Computer security) --- PKI (Computer security) --- Trust hierarchy (Computer security) --- Security and protection: access controls; authentication; cryptographic controls; information flow controls; security kernels; verification (Operating systems) --- Distributed processing --- 681.3*D46 Security and protection: access controls; authentication; cryptographic controls; information flow controls; security kernels; verification (Operating systems) --- Computer security. --- Réseaux d'ordinateurs --- Sécurité informatique --- Cryptographie à clé publique --- Sécurité --- 681.3*D46 --- Computer network security --- Network security, Computer --- Security of computer networks

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PKC 2003 was the Sixth International Workshop on Practice and Theory in Public Key Cryptography and was sponsored by IACR, the International As- ciation for Cryptologic Research (www.iacr.org). This year the workshop was organized in cooperation with the Department of Computer Science, Florida State University. The General Chair, Mike Burmester was responsible for local organization, registration, etc. There were 105 submitted papers which were considered by the Program Committee. This is an increase of 52% compared to PKC 2002, which took place in Paris, France, February 2002, and which was incorrectly identi?ed on the cover of the proceedings as being the fourth workshop. Due to the large number of submissions, some papers that contained new ideas had to be rejected. Priority was given to novel papers. Of the 105 submissions, 26 were selected for the proceedings. These contain the revised versions of the accepted papers. Each paper was sent to at least 3 members of the program committee for comments. Revisions were not checked for correctness of their scienti?c aspects and the authors bear full responsibility for the contents of their papers. Some authors will write ?nal versions of their papers for publication in refereed journals. I am very grateful to the members of the Program Committee for their hard work in the di?cult task of selecting roughly 1 out of 4 of the submitted papers.

Computer security --- Computers --- Data encryption (Computer science) --- Public key cryptography --- Sécurité informatique --- Ordinateurs --- Chiffrement (Informatique) --- Cryptographie à clé publique --- Congresses --- Access control --- Congrès --- Accès --- Contrôle --- Sécurité informatique --- Cryptographie à clé publique --- Congrès --- Accès --- Contrôle --- Asymmetric cryptography --- Public key cryptosystems --- Public key encryption --- Computer science. --- Computer communication systems. --- Data encryption (Computer science). --- Algorithms. --- Computers and civilization. --- Management information systems. --- Computer Science. --- Data Encryption. --- Computer Science, general. --- Computer Communication Networks. --- Algorithm Analysis and Problem Complexity. --- Computers and Society. --- Management of Computing and Information Systems. --- Cryptography --- Computer software. --- Information Systems. --- Cryptology. --- Software, Computer --- Computer systems --- Informatics --- Science --- Data encoding (Computer science) --- Encryption of data (Computer science) --- Computer-based information systems --- EIS (Information systems) --- Executive information systems --- MIS (Information systems) --- Sociotechnical systems --- Information resources management --- Management --- Civilization and computers --- Civilization --- Algorism --- Algebra --- Arithmetic --- Communication systems, Computer --- Computer communication systems --- Data networks, Computer --- ECNs (Electronic communication networks) --- Electronic communication networks --- Networks, Computer --- Teleprocessing networks --- Data transmission systems --- Digital communications --- Electronic systems --- Information networks --- Telecommunication --- Cyberinfrastructure --- Electronic data processing --- Network computers --- Communication systems --- Foundations --- Distributed processing --- Computer networks.

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Computer security --- Computers --- Data encryption (Computer science) --- Public key cryptography --- Sécurité informatique --- Ordinateurs --- Chiffrement (Informatique) --- Cryptographie à clé publique --- Congresses --- Access control --- Congresses. --- Congrès --- Accès --- Contrôle --- Computer security -- Congresses. --- Computers -- Access control -- Congresses. --- Data encryption (Computer science) -- Congresses. --- Electronic books. -- local. --- Public key cryptography -- Congresses. --- Public-key cryptography --- Engineering & Applied Sciences --- Computer Science --- Sécurité informatique --- Cryptographie à clé publique --- Congrès --- Accès --- Contrôle --- EPUB-LIV-FT SPRINGER-B --- Asymmetric cryptography --- Public key cryptosystems --- Public key encryption --- Computer science. --- Computer communication systems. --- Data encryption (Computer science). --- Algorithms. --- Computers and civilization. --- Management information systems. --- Computer engineering. --- Computer Science. --- Data Encryption. --- Computer Engineering. --- Algorithm Analysis and Problem Complexity. --- Computer Communication Networks. --- Computers and Society. --- Management of Computing and Information Systems. --- Computer-based information systems --- EIS (Information systems) --- Executive information systems --- MIS (Information systems) --- Sociotechnical systems --- Information resources management --- Management --- Civilization and computers --- Civilization --- Algorism --- Algebra --- Arithmetic --- Data encoding (Computer science) --- Encryption of data (Computer science) --- Cryptography --- Communication systems, Computer --- Computer communication systems --- Data networks, Computer --- ECNs (Electronic communication networks) --- Electronic communication networks --- Networks, Computer --- Teleprocessing networks --- Data transmission systems --- Digital communications --- Electronic systems --- Information networks --- Telecommunication --- Cyberinfrastructure --- Electronic data processing --- Network computers --- Informatics --- Science --- Design and construction --- Communication systems --- Foundations --- Distributed processing --- Computer software. --- Information Systems. --- Cryptology. --- Software, Computer --- Computer systems

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After two decades of research and development, elliptic curve cryptography now has widespread exposure and acceptance. Industry, banking, and government standards are in place to facilitate extensive deployment of this efficient public-key mechanism. Anchored by a comprehensive treatment of the practical aspects of elliptic curve cryptography, this guide explains the basic mathematics, describes state-of-the art implementation methods, and presents standardized protocols for public-key encryption, digital signatures, and key establishment. In addition, the book addresses some issues that arise in software and hardware implementation, side-channel attacks and countermeasures, and efficient parameter generation. Readers receive the theoretical fundamentals as an underpinning for a wealth of practical and accessible knowledge on efficient application. Features: *Breadth of coverage and unified, integrated approach to elliptic curve cryptosystems *Describes important protocols developed by industry and government, such as the FIPS 186-2 standard from the U.S. National Institute for Standards and Technology *Provides full exposition on key techniques for efficiently implementing finite-field and elliptic curve arithmetic *Distills complex mathematics and algorithms for easy understanding, yet total subject integration *Includes useful literature references in each chapter, as well as a list of algorithms and appendixes on sample parameters, ECC standards, and software tools This all-embracing and highly focused reference offers a unique overview and strategic viewpoint for one of the most widely used cryptosystems in wireless devices and smart cards today. It is an indispensable resource for any practitioners, professionals, or researchers in computer science, computer engineering, network design, and network data security. Darrel Hankerson is an industry consultant and author of books on cryptography and data compression. Alfred Menezes is co-director of the University of Waterloo’s Center for Applied Cryptographic Research, leader of an ECC algorithm standardization committee, and author of books on cryptography and cryptosystems. Scott Vanstone coauthored an applied cryptography handbook with A. Menezes and is founder of Certicom Corp. (Canada), a leading ECC company. Key topics: >> Public-key cryptography >> Cryptographic protocols >> Attacks and secure implementation >> Domain parameters >> Signature schemes >> Key establishment >> ECC standards >> Finite- and binary-field arithmetic ____________________________________ -- Security / Cryptography -- Beginning / Intermediate Level.

Computer security. --- Public key cryptography. --- Sécurité informatique --- Cryptographie à clé publique --- EPUB-LIV-FT SPRINGER-B --- 681.3*E3 Data encryption: data encryption standard; DES; public key cryptosystems --- Data encryption: data encryption standard; DES; public key cryptosystems --- Asymmetric cryptography --- Public key cryptosystems --- Public key encryption --- Computer science. --- Data encryption (Computer science). --- Coding theory. --- Computer Science. --- Data Encryption. --- Coding and Information Theory. --- Computer security --- Public key cryptography --- 681.3*E3 --- Cryptography --- Computer privacy --- Computer system security --- Computer systems --- Computers --- Cyber security --- Cybersecurity --- Electronic digital computers --- Protection of computer systems --- Security of computer systems --- Data protection --- Security systems --- Hacking --- Protection --- Security measures --- Cryptology. --- Information theory. --- Communication theory --- Communication --- Cybernetics --- Data compression (Telecommunication) --- Digital electronics --- Information theory --- Machine theory --- Signal theory (Telecommunication) --- Computer programming --- Data encoding (Computer science) --- Encryption of data (Computer science)