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Cryptography Algorithms

Cryptography Algorithms

By : Massimo Bertaccini
4.2 (18)
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Cryptography Algorithms

Cryptography Algorithms

4.2 (18)
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)
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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

Q-Cryptography

Now that you have learned about the fundamentals of Q-Mechanics, we will talk about Q-Cryptography. The curious story of its first application began in the 70s, when a Ph.D. candidate, Stephen Wiesner, from Columbia University had an idea. He invented a special kind of money that (theoretically) couldn't be counterfeited: quantum money. Wiesner's quantum money mostly relied on quantum physics regarding photons.

Suppose that we have a group of photons traveling all in the same direction on a predetermined axis. Moving in space, a photon has a vibration known as the polarization of the photon. The following diagram shows what we are talking about:

Figure 8.7 — Photon polarization

Figure 8.7 — Photon polarization

As you can see, photons spin their polarization in all directions. Still, if we place a filter, called a polaroid, oriented vertically, we will see that photons oriented vertically will pass across the filter 100% of the time. However, most of...

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