You're reading from Demystifying Cryptography with OpenSSL 3.0 Discover the best techniques to enhance your network security with OpenSSL 3.0

Product type Paperback

Published in Oct 2022

Publisher Packt

ISBN-13 9781800560345

Length 342 pages

Edition 1st Edition

Languages

Tools

Wireshark

Concepts

Cryptography

Author (1):

Alexei Khlebnikov

View More author details

Table of Contents (20) Chapters

Preface

1. Part 1: Introduction

2. Chapter 1: OpenSSL and Other SSL/TLS Libraries FREE CHAPTER

3. Part 2: Symmetric Cryptography

4. Chapter 2: Symmetric Encryption and Decryption

5. Chapter 3: Message Digests

6. Chapter 4: MAC and HMAC

7. Chapter 5: Derivation of an Encryption Key from a Password

8. Part 3: Asymmetric Cryptography and Certificates

9. Chapter 6: Asymmetric Encryption and Decryption

10. Chapter 7: Digital Signatures and Their Verification

11. Chapter 8: X.509 Certificates and PKI

12. Part 4: TLS Connections and Secure Communication

13. Chapter 9: Establishing TLS Connections and Sending Data over Them

14. Chapter 10: Using X.509 Certificates in TLS

15. Chapter 11: Special Usages of TLS

16. Part 5: Running a Mini-CA

17. Chapter 12: Running a Mini-CA

18. Index

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Understanding digital signatures

A digital signature is an array of bits that provides cryptographically strong guarantees of authenticity, integrity, and non-repudiation of a digital message. What do those guarantees mean? Let’s take a look:

Authenticity means that the message is coming from the claimed sender, provided that only the claimed sender possesses the private key that was used to produce the signature.
Integrity means that the message has not been changed by a third party during transmission, for example.
Non-repudiation means that the sender cannot deny that they produced the signature, provided that no one else has had access to the private key that was used to produce the signature.

A digital signature is produced using a private key that can be verified using the corresponding public key. Hence, digital signature and verification algorithms are considered asymmetric cryptography algorithms, even though they are not asymmetric encryption...