This third edition of the all time classic computer security book provides an overview of all types of computer security from centralized systems to distributed networks. The book has been updated to make the most current information in the field available and accessible to today's professionals.

Why do nations break into one another's most important computer networks? There is an obvious answer: to steal valuable information or to attack. But this isn't the full story. This book draws on often-overlooked documents leaked by Edward Snowden, real-world case studies of cyber operations, and policymaker perspectives to show that intruding into other countries' networks has enormous defensive value as well. Two nations, neither of which seeks to harm the other but neither of which trusts the other, will often find it prudent to launch intrusions. This general problem, in which a nation's means of securing itself threatens the security of others and risks escalating tension, is a bedrock concept in international relations and is called the 'security dilemma'. This book shows not only that the security dilemma applies to cyber operations, but also that the particular characteristics of the digital domain mean that the effects are deeply pronounced. The cybersecurity dilemma is both a vital concern of modern statecraft and a means of accessibly understanding the essential components of cyber operations.

Cryptography is a vital technology that underpins the security of information in computer networks. This book presents a comprehensive introduction to the role that cryptography plays in providing information security for everyday technologies such as the Internet, mobile phones, Wi-Fi networks, payment cards, Tor, and Bitcoin. This book is intended to be introductory, self-contained, and widely accessible. It is suitable as a first read on cryptography. Almost no prior knowledge of mathematics is required since the book deliberately avoids the details of the mathematics techniques underpinning cryptographic mechanisms. Instead our focus will be on what a normal user or practitioner of information security needs to know about cryptography in order to understand the design and use of everyday cryptographic applications. By focusing on the fundamental principles of modern cryptography rather than the technical details of current cryptographic technology, the main part this book is relatively timeless, and illustrates the application of these principles by considering a number of contemporary applications of cryptography. Following the revelations of former NSA contractor Edward Snowden, the book considers the wider societal impact of use of cryptography and strategies for addressing this. A reader of this book will not only be able to understand the everyday use of cryptography, but also be able to interpret future developments in this fascinating and crucially important area of technology.

A Code Developer Uncovers a Japanese Spy Ring Full of intrigue, adventure, and romance, this new series celebrates the unsung heroes—the heroines of WWII. FBI cryptographer Eloise Marshall is grieving the death of her brother, who died during the attack on Pearl Harbor, when she is assigned to investigate a seemingly innocent letter about dolls. Agent Phillip Clayton is ready to enlist and head oversees when asked to work one more FBI job. A case of coded defense coordinates related to dolls should be easy, but not so when the Japanese Consulate gets involved, hearts get entangled, and Phillip goes missing. Can Eloise risk loving and losing again?

In his first book since the bestselling Fermat's Enigma, Simon Singh offers the first sweeping history of encryption, tracing its evolution and revealing the dramatic effects codes have had on wars, nations, and individual lives. From Mary, Queen of Scots, trapped by her own code, to the Navajo Code Talkers who helped the Allies win World War II, to the incredible (and incredibly simple) logisitical breakthrough that made Internet commerce secure, The Code Book tells the story of the most powerful intellectual weapon ever known: secrecy. Throughout the text are clear technical and mathematical explanations, and portraits of the remarkable personalities who wrote and broke the world's most difficult codes. Accessible, compelling, and remarkably far-reaching, this book will forever alter your view of history and what drives it. It will also make you wonder how private that e-mail you just sent really is.

Integer Algorithms in Cryptology and Information Assurance is a collection of the author's own innovative approaches in algorithms and protocols for secret and reliable communication. It concentrates on the “what” and “how” behind implementing the proposed cryptographic algorithms rather than on formal proofs of “why” these algorithms work.The book consists of five parts (in 28 chapters) and describes the author's research results in:This text contains innovative cryptographic algorithms; computationally efficient algorithms for information assurance; new methods to solve the classical problem of integer factorization, which plays a key role in cryptanalysis; and numerous illustrative examples and tables that facilitate the understanding of the proposed algorithms.The fundamental ideas contained within are not based on temporary advances in technology, which might become obsolete in several years. The problems addressed in the book have their own intrinsic computational complexities, and the ideas and methods described in the book will remain important for years to come.

This book constitutes the refereed proceedings of the Cryptographer's Track at the RSA Conference 2017, CT-RSA 2017, held in San Francisco, CA, USA, in February 2017. The 25 papers presented in this volume were carefully reviewed and selected from 77 submissions. CT-RSA has become a major publication venue in cryptography. It covers a wide variety of topics from public-key to symmetric key cryptography and from cryptographic protocols to primitives and their implementation security. This year selected topics such as cryptocurrencies and white-box cryptography were added to the call for papers.

In their book "Era of Exponential Encryption - Beyond Cryptographic Routing" the authors provide a vision that can demonstrate an increasing multiplication of options for encryption and decryption processes: Similar to a grain of rice that doubles exponentially in every field of a chessboard, more and more newer concepts and programming in the area of cryptography increase these manifolds: both, encryption and decryption, require more session-related and multiple keys, so that numerous options even exist for configuring hybrid encryption: with different keys and algorithms, symmetric and asymmetrical methods, or even modern multiple encryption, with that ciphertext is converted again and again to ciphertext. It will be analyzed how a handful of newer applications like e.g. Spot-On and GoldBug E-Mail Client & Crypto Chat Messenger and other open source software programming implement these encryption mechanisms. Renewing a key several times - within the dedicated session with "cryptographic calling" - has forwarded the term of "perfect forward secrecy" to "instant perfect forward secrecy" (IPFS). But even more: if in advance a bunch of keys is sent, a decoding of a message has to consider not only one present session key, but over dozens of keys are sent - prior before the message arrives. The new paradigm of IPFS has already turned into the newer concept of these Fiasco Keys. Fiasco Keys are keys, which provide over a dozen possible ephemeral keys within one session and define Fiasco Forwarding, the approach which complements and follows IPFS. And further: by adding routing- and graph-theory to the encryption process, which is a constant part of the so called Echo Protocol, an encrypted packet might take different graphs and routes within the network. This shifts the current status to a new age: The Era of Exponential Encryption, so the vision and description of the authors. If routing does not require destination information but is replaced by cryptographic insights, then it is "beyond cryptographic routing". "Cryptographic Discovery" means: If the cryptographic token is matching, the message belongs to me. The Echo Protocol is in this regard an initial welcome within the Era of Exponential Encryption. The authors identify also four arms within the Era of Exponential Encryption and derive from these developments social, legal, political and economic recommendations.

There are few innovations that have the potential to revolutionize commerce and have evolved so quickly that there remain significant misunderstandings about their operation, opportunity, and challenges as has Bitcoin in the dozen years since its invention. The potential for banking, transacting, and public recording of important records is profound, but can be displacing if not done with appropriate care, and is downright dangerous if certain pitfalls are not noted and avoided. Among other things, this book proves the existence of a Bitcoin dilemma that challenges the conventional wisdom which mistakenly asserts the incredibly intensive energy consumption in Proof-of-Work cryptocurrency mining will be remedied by more efficient mining machines or sustainable power sources. It shows for the first time within a well-specified economic model of Bitcoin mining that the recent runup in electricity consumption has a simple and inevitable explanation. For a coin with almost completely inelastic supply and steadily increasing demand, the conditions for accelerating electricity demand is consistent with economic theory and may well characterize the future of Bitcoin. The book also demonstrates the counterintuitive result that improvements in mining efficiency, in terms of electricity consumption per terahash of processing power, or decreases in electricity costs as cheaper sustainable energy is diverted to this industry, merely exacerbates the acceleration of energy consumption because of a prisoner’s dilemma arms-race-to-the-bottom. The book proposes policy solutions to mitigate this Bitcoin dilemma but note that the mobility of industry capacity which needs but a ready supply of electricity and an Internet connection frustrates local regulation and warrants global solutions. The incredible opportunities of this industry will only be realized if our regulators, legislators, entrepreneurs, and general public garner a more complete and objective understanding of this and other Proof-of-Work mining techniques. The book provides this broader perspective based on the author’s research as an economist, his position as a director of a large regional bank, his understanding as a technologist and as an environmental and sustainability researcher, and his public policy experience as a mayor who has also written books and articles about public policy and public finance.

This self-contained introduction to modern cryptography emphasizes the mathematics behind the theory of public key cryptosystems and digital signature schemes. The book focuses on these key topics while developing the mathematical tools needed for the construction and security analysis of diverse cryptosystems. Only basic linear algebra is required of the reader; techniques from algebra, number theory, and probability are introduced and developed as required. This text provides an ideal introduction for mathematics and computer science students to the mathematical foundations of modern cryptography. The book includes an extensive bibliography and index; supplementary materials are available online. The book covers a variety of topics that are considered central to mathematical cryptography. Key topics include: classical cryptographic constructions, such as Diffie–Hellmann key exchange, discrete logarithm-based cryptosystems, the RSA cryptosystem, and digital signatures; fundamental mathematical tools for cryptography, including primality testing, factorization algorithms, probability theory, information theory, and collision algorithms; an in-depth treatment of important cryptographic innovations, such as elliptic curves, elliptic curve and pairing-based cryptography, lattices, lattice-based cryptography, and the NTRU cryptosystem. The second edition of An Introduction to Mathematical Cryptography includes a significant revision of the material on digital signatures, including an earlier introduction to RSA, Elgamal, and DSA signatures, and new material on lattice-based signatures and rejection sampling. Many sections have been rewritten or expanded for clarity, especially in the chapters on information theory, elliptic curves, and lattices, and the chapter of additional topics has been expanded to include sections on digital cash and homomorphic encryption. Numerous new exercises have been included.