Book Image

Cryptography Algorithms

By : Massimo Bertaccini
Book Image

Cryptography Algorithms

By: Massimo Bertaccini

Overview of this book

Cryptography Algorithms is designed to help you get up and running with modern cryptography algorithms. You'll not only explore old and modern security practices but also discover practical examples of implementing them effectively. The book starts with an overview of cryptography, exploring key concepts including popular classical symmetric and asymmetric algorithms, protocol standards, and more. You'll also cover everything from building crypto codes to breaking them. In addition to this, the book will help you to understand the difference between various types of digital signatures. As you advance, you will become well-versed with the new-age cryptography algorithms and protocols such as public and private key cryptography, zero-knowledge protocols, elliptic curves, quantum cryptography, and homomorphic encryption. Finally, you'll be able to apply the knowledge you've gained with the help of practical examples and use cases. By the end of this cryptography book, you will be well-versed with modern cryptography and be able to effectively apply it to security applications.
Table of Contents (15 chapters)
1
Section 1: A Brief History and Outline of Cryptography
3
Section 2: Classical Cryptography (Symmetric and Asymmetric Encryption)
7
Section 3: New Cryptography Algorithms and Protocols
12
Section 4: Homomorphic Encryption and the Crypto Search Engine

Quantum computing

In this section, I will talk about quantum computing and quantum computers. The difference between the two is that quantum computing is the computational power that's expressed by a quantum system, while a quantum computer is the system's physical implementation, which is composed of hardware and software. The first idea of a quantum computer was originally proposed by Richard Feynman in 1982; then, in 1985, David Deutsch formulated the first theoretical model of it. This field had a big evolution in the last decades; some private companies began to take action and experiment with new models of quantum computers. Some of them, such as D-Waves and Righetti Computing, raised millions of dollars for the research and development of these machines and their relative software:

Figure 8.13 – D-Waves quantum computer

As you should already know, normal computers work with bits, while quantum computers work with qubits. As we...