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Cryptography Algorithms

You're reading from   Cryptography Algorithms Explore New Algorithms in Zero-knowledge, Homomorphic Encryption, and Quantum Cryptography

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Product type Paperback
Published in Aug 2024
Publisher Packt
ISBN-13 9781835080030
Length 410 pages
Edition 2nd Edition
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Author (1):
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Massimo Bertaccini Massimo Bertaccini
Author Profile Icon Massimo Bertaccini
Massimo Bertaccini
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Toc

Table of Contents (17) Chapters Close

Preface 1. Section 1: A Brief History and Outline of Cryptography FREE CHAPTER
2. Deep Dive into Cryptography 3. Section 2: Classical Cryptography (Symmetric and Asymmetric Encryption)
4. Symmetric Encryption Algorithms 5. Asymmetric Encryption Algorithms 6. Hash Functions and Digital Signatures 7. Section 3: New Cryptography Algorithms and Protocols
8. Zero-Knowledge Protocols 9. New Inventions in Cryptography and Logical Attacks 10. Elliptic Curves 11. Homomorphic Encryption and Crypto Search Engine 12. Section 4: Quantum Cryptography
13. Quantum Cryptography 14. Quantum Search Algorithms and Quantum Computing 15. Other Books You May Enjoy
16. Index

The main scenario of a ZKP – the digital cave

Imagine this fantastic scenario: Peggy has to demonstrate to Victor that she is able to open a locked door in the middle of Ali Baba’s cave, a cave with only one entrance/exit that can be reached from two directions, as you can see in the following figure. I suppose you have noticed that I have changed the names of the two actors, Peggy and Victor, from the usual Alice and Bob, just because here a verification is due, and the names Peggy and Victor match better with the first letters of prover (P) and verifier (V).

Figure 5.1 – Ali Baba's cave

Figure 5.1: Ali Baba’s cave

This example involves Ali Baba’s cave revisited in modern times, in which the door in the middle of the cave is locked through a secret electronic combination that’s strong enough to prevent the entry of anyone who doesn’t know the secret combination.

Now, suppose that Peggy must prove to Victor that she knows the combination to unlock the...

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