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

Why subscribe?

19. Other Books You May Enjoy

Packt is searching for authors like you

MAC and HMAC

In this chapter, we will learn about message authentication codes (MACs), also known as authentication tags. MACs are used in popular secure network protocols, such as TLS, SSH, and IPsec in order to establish both the integrity and authenticity of the transmitted data. They are also used in proprietary network protocols, for example, in financial software, for the same purpose. Additionally, MACs can be used in non-networked authenticated encryption, as we demonstrated in Chapter 2, Symmetric Encryption and Decryption. Another application of MAC is as the basis of some key derivation functions, such as PBKDF2. Key derivation will be covered in more detail in Chapter 5, Derivation of an Encryption Key from a Password. We will learn how to calculate a MAC using both the command line and C code.

In this chapter, we are going to cover the following topics: