This monograph gives a thorough treatment of the celebrated compositions of signature and encryption that allow for verifiability, that is, to efficiently prove properties about the encrypted data. This study is provided in the context of two cryptographic primitives: (1) designated confirmer signatures, an opaque signature which was introduced to control the proliferation of certified copies of documents, and (2) signcryption, a primitive that offers privacy and authenticity at once in an efficient way. This book is a useful resource to researchers in cryptology and information security, graduate and PhD students, and security professionals.

The4thInternationalConferenceonPairing-BasedCryptography(Pairing2010) was held in Yamanaka Hot Spring, Japan, during December 13-15, 2010. It was jointly co-organized by the National Institute of Advanced Industrial Science and Technology (AIST), Japan, and the Japan Advanced Institute of Science and Technology (JAIST). The goal of Pairing 2010 was to bring together leading researchersand pr- titioners from academia and industry, all concerned with problems related to pairing-based cryptography. We hope that this conference enhanced com- nication among specialists from various research areas and promoted creative interdisciplinary collaboration. Theconferencereceived64submissionsfrom17countries,outofwhich25- pers from 13 countries were accepted for publication in these proceedings. At least three Program Committee (PC) members reviewed each submitted paper, while submissions co-authored by a PC member were submitted to the more stringent evaluation of ?ve PC members. In addition to the PC members, many externalreviewersjoinedthereviewprocessintheirparticularareasofexpertise. We were fortunate to have this energetic team of experts, and are deeply gra- ful to all of them for their hard work, which included a very active discussion phase. The paper submission, review and discussion processes were e?ectively and e?ciently made possible by the Web-based system iChair. Furthermore,theconferencefeaturedthreeinvitedspeakers:JensGrothfrom University College London, Joseph H. Silverman from Brown University, and Gene Tsudik from University of California at Irvine, whose lectures on cutti- edge research areas- "Pairing-Based Non-interactive Zero-Knowledge Proofs," "A Survey of Local and Global Pairings on Elliptic Curves and Abelian Va- eties," and "Some Security Topics with Possible Applications for Pairing-Based Cryptography," respectively- contributed in a signi?cant part to the richness of the program.

The5thChinaInternationalConferenceonInformationSecurityandCryptology (Inscrypt 2009) was co-organized by the State Key Laboratory of Information SecurityandbytheChineseAssociationforCryptologicResearchincooperation with the International Association for Cryptologic Research (IACR). The c- ference was held in Beijing, China, in the middle of December, and was further sponsored by the Institute of Software, the Graduate University of the Chinese Academy of Sciences and the National Natural Science Foundations of China. The conference is a leading annual international event in the area of cryptog- phy and information security taking place in China. The scienti?c program of the conference covered all areas of current research in the ?eld, with sessions on central areas of cryptographic research and on many important areas of - formation security. The conference continues to get the support of the entire international community, re?ecting on the fact that the research areas covered byInscryptareimportantto moderncomputing,whereincreasedsecurity,trust, safety and reliability are required. The international Program Committee of Inscrypt 2009 received a total of 147 submissions from more than 20 countries and regions, from which only 32 submissions were selected for presentation, 22 of which in the regular papers track and 10 submissions in the short papers track. All anonymous submissions were reviewed by experts in the relevant areas and based on their ranking, te- nical remarks and strict selection criteria the papers were chosen for the various tracks. The selection to both tracks was a highly competitive process.

". . .the best introduction to cryptography I've ever seen. . . . The book the National Security Agency wanted never to be published. . . ." -Wired Magazine

". . .monumental . . . fascinating . . . comprehensive . . . the definitive work on cryptography for computer programmers . . ." -Dr. Dobb's Journal

". . .easily ranks as one of the most authoritative in its field." -PC Magazine

". . .the bible of code hackers." -The Millennium Whole Earth Catalog

This new edition of the cryptography classic provides you with a comprehensive survey of modern cryptography. The book details how programmers and electronic communications professionals can use cryptography-the technique of enciphering and deciphering messages-to maintain the privacy of computer data. It describes dozens of cryptography algorithms, gives practical advice on how to implement them into cryptographic software, and shows how they can be used to solve security problems. Covering the latest developments in practical cryptographic techniques, this new edition shows programmers who design computer applications, networks, and storage systems how they can build security into their software and systems.

What's new in the Second Edition?
* New information on the Clipper Chip, including ways to defeat the key escrow mechanism
* New encryption algorithms, including algorithms from the former Soviet Union and South Africa, and the RC4 stream cipher
* The latest protocols for digital signatures, authentication, secure elections, digital cash, and more
* More detailed information on key management and cryptographic implementations

Cyber-terrorism and corporate espionage are increasingly common and devastating threats, making trained network security professionals more important than ever. This timely text helps you gain the knowledge and skills to protect networks using the tools and techniques of an ethical hacker. The authors begin by exploring the concept of ethical hacking and its practitioners, explaining their importance in protecting corporate and government data from cyber attacks. The text then provides an in-depth guide to performing security testing against computer networks, covering current tools and penetration testing methodologies. Updated for today's cyber security environment, the Third Edition of this trusted text features new computer security resources, coverage of emerging vulnerabilities and innovative methods to protect networks, a new discussion of mobile security, and information on current federal and state computer crime laws, including penalties for illegal computer hacking.

In 25 concise steps, you will learn the basics of blockchain technology. No mathematical formulas, program code, or computer science jargon are used. No previous knowledge in computer science, mathematics, programming, or cryptography is required. Terminology is explained through pictures, analogies, and metaphors. This book bridges the gap that exists between purely technical books about the blockchain and purely business-focused books. It does so by explaining both the technical concepts that make up the blockchain and their role in business-relevant applications. What You'll Learn What the blockchain is Why it is needed and what problem it solves Why there is so much excitement about the blockchain and its potential Major components and their purpose How various components of the blockchain work and interact Limitations, why they exist, and what has been done to overcome them Major application scenarios Who This Book Is For Everyone who wants to get a general idea of what blockchain technology is, how it works, and how it will potentially change the financial system as we know it

This book presents two practical physical attacks. It shows how attackers can reveal the secret key of symmetric as well as asymmetric cryptographic algorithms based on these attacks, and presents countermeasures on the software and the hardware level that can help to prevent them in the future. Though their theory has been known for several years now, since neither attack has yet been successfully implemented in practice, they have generally not been considered a serious threat. In short, their physical attack complexity has been overestimated and the implied security threat has been underestimated. First, the book introduces the photonic side channel, which offers not only temporal resolution, but also the highest possible spatial resolution. Due to the high cost of its initial implementation, it has not been taken seriously. The work shows both simple and differential photonic side channel analyses. Then, it presents a fault attack against pairing-based cryptography. Due to the need for at least two independent precise faults in a single pairing computation, it has not been taken seriously either. Based on these two attacks, the book demonstrates that the assessment of physical attack complexity is error-prone, and as such cryptography should not rely on it. Cryptographic technologies have to be protected against all physical attacks, whether they have already been successfully implemented or not. The development of countermeasures does not require the successful execution of an attack but can already be carried out as soon as the principle of a side channel or a fault attack is sufficiently understood.

This book constitutes the thoroughly refereed post-conference proceedings of the 22nd International Workshop on Fast Software Encryption, held in Istanbul, Turkey, March 8-11, 2015. The 28 revised full papers presented were carefully reviewed and selected from 71 initial submissions. The papers are organized in topical sections on block cipher cryptanalysis; understanding attacks; implementation issues; more block cipher cryptanalysis; cryptanalysis of authenticated encryption schemes; proofs; design; lightweight; cryptanalysis of hash functions and stream ciphers; and mass surveillance.

This book constitutes the thoroughly refereed proceedings of the 8th International Conference on Information Theoretic Security, ICITS 2015, held in Lugano, Switzerland, in May 2015. The 17 full papers presented in this volume were carefully reviewed and selected from 57 submissions. The papers cover a variety of topics at the intersection of cryptography, information theory, and quantum physics.

This book constitutes the thoroughly refereed proceedings of the 15th International Workshop on Information Security Applications, WISA 2014, held on Jeju Island, Korea, in August 2014. The 30 revised full papers presented in this volume were carefully reviewed and selected from 69 submissions. The papers are organized in topical sections such as malware detection; mobile security; vulnerability analysis; applied cryptography; network security; cryptography; hardware security; and critical infrastructure security and policy.

This book covers novel research on construction and analysis of optimal cryptographic functions such as almost perfect nonlinear (APN), almost bent (AB), planar and bent functions. These functions have optimal resistance to linear and/or differential attacks, which are the two most powerful attacks on symmetric cryptosystems. Besides cryptographic applications, these functions are significant in many branches of mathematics and information theory including coding theory, combinatorics, commutative algebra, finite geometry, sequence design and quantum information theory. The author analyzes equivalence relations for these functions and develops several new methods for construction of their infinite families. In addition, the book offers solutions to two longstanding open problems, including the problem on characterization of APN and AB functions via Boolean, and the problem on the relation between two classes of bent functions.

This book deals with timing attacks on cryptographic ciphers. It describes and analyzes various unintended covert timing channels that are formed when ciphers are executed in microprocessors. The book considers modern superscalar microprocessors which are enabled with features such as multi-threaded, pipelined, parallel, speculative, and out-of order execution. Various timing attack algorithms are described and analyzed for both block ciphers as well as public-key ciphers. The interplay between the cipher implementation, the system architecture, and the attack's success is analyzed. Further hardware and software countermeasures are discussed with the aim of illustrating methods to build systems that can protect against these attacks.

This book constitutes the refereed proceedings of the 17th International Conference on Information Security, ISC 2014, held in Hong Kong, China, in October 2014. The 20 revised full papers presented together with 16 short papers and two invited papers were carefully reviewed and selected from 106 submissions. The papers are organized in topical sections on public-key encryption, authentication, symmetric key cryptography, zero-knowledge proofs and arguments, outsourced and multi-party computations, implementation, information leakage, firewall and forensics, Web security, and android security.

This book constitutes the refereed proceedings of the International Conference on Applications and Techniques in Information Security, ATIS 2014, held in Melbourne, Australia, in November 2014. The 16 revised full papers and 8 short papers presented were carefully reviewed and selected from 56 submissions. The papers are organized in topical sections on applications; curbing cyber crimes; data privacy; digital forensics; security implementations.

Sebastian Pape discusses two different scenarios for authentication. On the one hand, users cannot trust their devices and nevertheless want to be able to do secure authentication. On the other hand, users may not want to be tracked while their service provider does not want them to share their credentials. Many users may not be able to determine whether their device is trustworthy, i.e. it might contain malware. One solution is to use visual cryptography for authentication. The author generalizes this concept to human decipherable encryption schemes and establishes a relationship to CAPTCHAS. He proposes a new security model and presents the first visual encryption scheme which makes use of noise to complicate the adversary's task. To prevent service providers from keeping their users under surveillance, anonymous credentials may be used. However, sometimes it is desirable to prevent the users from sharing their credentials. The author compares existing approaches based on non-transferable anonymous credentials and proposes an approach which combines biometrics and smartcards.

Bulletproof SSL and TLS is a complete guide to using SSL and TLS encryption to deploy secure servers and web applications. Written by Ivan Ristic, the author of the popular SSL Labs web site, this book will teach you everything you need to know to protect your systems from eavesdropping and impersonation attacks. In this book, you'll find just the right mix of theory, protocol detail, vulnerability and weakness information, and deployment advice to get your job done: Comprehensive coverage of the ever-changing field of SSL/TLS and Internet PKI, with updates to the digital version For IT security professionals, help to understand the risks For system administrators, help to deploy systems securely For developers, help to design and implement secure web applications Practical and concise, with added depth when details are relevant Introduction to cryptography and the latest TLS protocol version Discussion of weaknesses at every level, covering implementation issues, HTTP and browser problems, and protocol vulnerabilities Coverage of the latest attacks, such as BEAST, CRIME, BREACH, Lucky 13, RC4 biases, Triple Handshake Attack, and Heartbleed Thorough deployment advice, including advanced technologies, such as Strict Transport Security, Content Security Policy, and pinning Guide to using OpenSSL to generate keys and certificates and to create and run a private certification authority Guide to using OpenSSL to test servers for vulnerabilities Practical advice for secure server configuration using Apache httpd, IIS, Java, Nginx, Microsoft Windows, and Tomcat

Describes Information Hiding in communication networks, and highlights their important issues, challenges, trends, and applications. * Highlights development trends and potential future directions of Information Hiding * Introduces a new classification and taxonomy for modern data hiding techniques * Presents different types of network steganography mechanisms * Introduces several example applications of information hiding in communication networks including some recent covert communication techniques in popular Internet services

This book constitutes the refereed proceedings of the 32nd Annual International Cryptology Conference, CRYPTO 2012, held in Santa Barbara, CA, USA, in August 2012. The 48 revised full papers presented were carefully reviewed and selected from 225 submissions. The volume also contains the abstracts of two invited talks. The papers are organized in topical sections on symmetric cryptosystems, secure computation, attribute-based and functional encryption, proofs systems, protocols, hash functions, composable security, privacy, leakage and side-channels, signatures, implementation analysis, black-box separation, cryptanalysis, quantum cryptography, and key encapsulation and one-way functions.

This book constitutes the refereed proceedings of the 10th International Conference on Applied Cryptography and Network Security, ACNS 2012, held in Singapore, in June 2012. The 33 revised full papers included in this volume were carefully reviewed and selected from 192 submissions. They are organized in topical sessions on authentication, key management, block ciphers, identity-based cryptography, cryptographic primitives, cryptanalysis, side channel attacks, network security, Web security, security and privacy in social networks, security and privacy in RFID systems, security and privacy in cloud systems, and security and privacy in smart grids.

This book constitutes the refereed proceedings of the 7th International Conference on Sequences and Their Applications, SETA 2012, held in Waterloo, Canada, in June 2012. The 28 full papers presented together with 2 invited papers in this volume were carefully reviewed and selected from 48 submissions. The papers are grouped in topical sections on perfect sequences; finite fields; boolean functions; Golomb 80th birthday session; linear complexity; frequency hopping; correlation of sequences; bounds on sequences, cryptography; aperiodic correlation; and Walsh transform.

This book constitutes the refereed proceedings of the 7th International Conference on Information Systems Security, ICISS 2011, held in Kolkata, India, in December 2011.
The 20 revised full papers presented together with 4 short papers and 4 invited papers were carefully reviewed and selected from 105 submissions. The papers are organized in topical sections on access control and authorization, malwares and anomaly detection, crypto and steganographic systems, verification and analysis, wireless and mobile systems security, Web and network security.

This book constitutes the thoroughly refereed post-conference proceedings of the 7th European Workshop on Public Key Infrastructures, Services and Applications, EuroPKI 2010, held in Athens, Greece, in September 2010. The 14 revised full papers presented together with an invited article were carefully reviewed and selected from 41 submissions. The papers are organized in topical sections on authentication mechanisms; privacy preserving techniques; PKI & PKC applications; electronic signature schemes; identity management.

This book constitutes the proceedings of the 14th International Symposium on Recent Advances in Intrusion Detection, RAID 2011, held in Menlo Park, CA, USA in September 2011. The 20 papers presented were carefully reviewed and selected from 87 submissions. The papers are organized in topical sections on application security; malware; anomaly detection; Web security and social networks; and sandboxing and embedded environments.