【免费】ProCryptographyandCryptanalysiswithC++20

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《Pro Cryptography and Cryptanalysis with C 20》是一本面向具备一定编程基础且工作1-3年的研发人员的高级密码学和密码分析的教材。本书通过C语言编写和实现高级算法，深入探讨了工厂模式、策略模式、观察者模式等在Spring框架中的应用，以及IOC、AOP、代理、切面和循环依赖的设计和实现原理。作者Mariu Iulian Mihailescu和Stefania Loredana Nita通过编写简化版Spring框架的代码，从代码编写实现到内容需求分析和方案设计，全面讲解了Spring框架的原理和内核。读者在学习过程中除了理解代码的编写和实现，还要结合内容上的需求分析和方案设计进行实践和调试对应的代码。该书的目标是通过实际的编程实践来学习高级密码学和密码分析的理论和应用。读者可以通过C语言编写代码，并实现各种高级算法，如数据加密、解密、数字签名、哈希函数等。同时，本书还讨论了密码学和密码分析的基本概念和原理，包括对称加密算法、非对称加密算法、密钥交换协议、数字证书等。除了深入了解密码学和密码分析的基本理论和实践，本书还重点介绍了Spring框架中常用的设计模式和技术。作者详细解释了工厂模式、策略模式、观察者模式等在Spring框架中的应用场景和实现方法。这些设计模式和技术可以提升开发效率和代码可维护性，并在实际项目中应用。此外，本书还介绍了Spring框架中的核心概念，如IOC（控制反转）、AOP（面向切面编程）、代理和循环依赖等。读者可以学习到这些概念的设计和实现原理，了解Spring框架如何通过IOC容器管理对象之间的依赖关系，如何通过AOP实现横切关注点的处理，如何使用代理实现功能扩展，以及如何解决循环依赖的问题。总而言之，《Pro Cryptography and Cryptanalysis with C 20》是一本综合性的教材，涵盖了高级密码学和密码分析的理论和实践、Spring框架的设计原理和内核。读者可以通过学习和实践，掌握C语言编写高级算法的技巧，理解密码学和密码分析的基本概念和原理，并掌握Spring框架中常用的设计模式和技术。这本书适合想要深入研究密码学和密码分析以及Spring框架的研发人员阅读。通过阅读并实践本书内容，读者将能够在实际项目中应用所学知识，提升自己的编程能力和项目开发效率。

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PART I

Foundations

implementations using C++20. This book will offer a practical perspective, giving the

readers the necessary tools to design cryptography and cryptanalysis techniques in

terms of practice. Most of the implementations are in C++20 using the latest features

and improvements of the programming language (see Chapter 6). The book is an

advanced and exhaustive work, offering a comprehensive view of the most important

topics in information security, cryptography, and cryptanalysis. The content of the

book can be used in a wide spectrum of areas by many professionals, such as security

experts with their audits, military experts and personnel, ethical hackers, teachers in

academia, researchers, software developers, software engineers when security and

cryptographic solutions must be implemented in a real business software environment,

professors teaching student courses (undergraduate and graduate level, master’s degree,

professional and academic doctoral degree), business analysts, and many more.

Cryptography andCryptanalysis

It is very important to understand the meanings of the main concepts involved in a

secure communication process and to know their boundaries.

• Cryptology is the science or art of secret writings. The main goal is to

protect and defend the secrecy and confidentiality of the information

with the help of cryptographic algorithms.

• Cryptography is the defensive side of cryptology. The main objective

is to create and design cryptographic systems and their rules.

Cryptography is a special kind of art, the art of protecting information

by transforming it into an unreadable format called ciphertext.

• Cryptanalysis is the offensive side of cryptology. Its main objective

is to study the cryptographic systems to provide the necessary

characteristics to fulfill the function for which they have been

designed. Cryptanalysis can analyze the cryptographic systems of

third parties through cryptograms to break them in order to obtain

useful information for business purposes. Cryptanalysts, code

breakers, and ethical hackers are the people who deal with the field

of cryptanalysis.

Chapter 1 GettinG Started in CryptoGraphy and CryptanalySiS

• A cryptographic primitive represents a well-established or low-

level cryptographic algorithm that is used to build cryptographic

protocols. Examples of such routines include hash functions or

encryption functions.

The book provides a deep examination of all three aspects from a practical point

of view with references to the theoretical background by illustrating how a theoretical

algorithm should be analyzed for implementation.

Book Structure

The book is divided into 23 chapters in three parts (see Table1-1): Part I: Foundations

(Chapters 1-8), Part II: Pro Cryptography (Chapters 9-16), and Part III: Pro Cryptanalysis

(Chapters 17-23). Figure1-1 shows how to read the book and what chapters depend on

each other.

The Part I: Foundations (Chapters 1-8) covers, from a beginner to advanced

level and from theoretical to practical, the basic concepts of cryptography (Chapter 2).

Chapter 3 covers a collection of key elements regarding complexity theory, probability

theory, information theory, number theory, abstract algebra, and finite fields and how

they can be implemented using C++20, showing their interaction with the cryptography

and cryptanalysis algorithms.

Chapters 4 and Chapter 5 focus on integer arithmetic and floating-point arithmetic

processing. These chapters are vital because other chapters and algorithms depend on

the content of these chapters. Number representations and working with them via the

memory of the computer can be a difficult task.

In Chapter 6, we discuss the newest features and enhancements of C++20. We

give a presentation on how the new features and enhancements play an important

role in developing cryptography and cryptanalysis algorithms and methods. We cover

three-way comparisons, lambdas in unevaluated contexts, string literals, atomic smart

pointers, <version> headers, ranges, coroutines, modules, and more.

Chapter 7 presents the most important guidelines for securing the coding process,

keeping an important balance between security and usability based on the most

expected scenarios based on trusted code. We cover important topics such as securing

state data, security and user input, security-neutral code, and library codes that expose

the protected resources.

Chapter 1 GettinG Started in CryptoGraphy and CryptanalySiS

Chapter 8 introduces the cryptography model and services that are used by C++.

We cover important topics like C++ basic implementations, object inheritance, how

cryptography algorithms are implemented, stream design, configuring cryptography

classes, how to choose cryptography algorithms, generating the keys for encryption

and decryption, storing asymmetric keys in a key container, cryptographic signatures,

ensuring data integrity using hash codes and functions, creating and designing

cryptographic schemes, encryption of XML elements with symmetric keys, assuring and

guaranteeing interoperability of the applications between different platforms, such as

Windows, MacOS, UNIX/Linux, and more.

Part II: Pro Cryptography (Chapters 9-16) contains the most important modern

cryptographic primitives. Chapters 9-16 discuss the advanced cryptography topics by

showing implementations and how to approach this kind of advanced topic from a

mathematical background to a real-life environment.

Chapter 9 discusses Cryptography Next Generation (CNG), which is used in the

implementation of the Elliptic Curve Diffie-Hellman (ECDH) algorithm, and how to

realize the necessary cryptographic operations.

Chapter 10 provides an introduction to the Lattice Cryptography Library and how it

works, pointing out the importance of post-quantum cryptography. Implementations of

key exchange protocols proposed by Alkim, Ducas, Poppelmann, and Schwabe [1] are

discussed. We continue our discussion with an instantiation of Chris Peikert’s key exchange

protocol [2]. We point out that the implementation is based on modern techniques for

computing, known as the number theoretic transform (NTT). The implementations apply

errorless fast convolution functions over successions of integer numbers.

Chapter 11 and Chapter 12 present two important cryptographic primitives,

homomorphic and searchable encryption. For searchable encryption (SE), Chapter 11

presents an implementation using C++20 and showing the advantages and disadvantages

by removing the most common patterns from encrypted data. In Chapter 12, we discuss

how to use the SEAL library for fully homomorphic encryption. The implementation is

discussed based on the proposal of Shai Halevi and Victor Shoup in [3].

Chapter 13 covers the issues that are generated during the implementation of (ring)

learning with errors cryptography mechanisms. We give as an example an implementation

of the lattice-based key exchange protocol, a library that is used only for experiments.

Chapter 14 is based on the new concepts behind chaos-based cryptography and how

they can be translated into practice. The chapter generates some new outputs and its

contribution is important for the advancement of cryptography as it is a new topic that

hasn’t received proper attention until now.

Chapter 1 GettinG Started in CryptoGraphy and CryptanalySiS

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