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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Overview of the cryptographic hash functions supported by OpenSSL

In this section, we will review the cryptographic hash functions supported by OpenSSL and their properties, such as security, speed, and message digest size. We will also learn a bit about the history of those hash functions.

Reviewing the SHA-2 family of hash functions

The SHA-2 family contains the most popular modern cryptographic hash function, SHA-256. SHA-256 outputs a 256-bit digest and has a collision resistance level of 128 bits.

SHA-256 is widely used. It is currently the default hash function that’s used in the TLS protocol, as well as the default signing function for X.509 certificates and SSH keys. Several cryptocurrencies, including Bitcoin, use SHA-256 to verify transactions and proof of work. The popular Git SCM is migrating to SHA-256 hashes for its blockchain implementation and object identification processes. SHA-256 is used in many security protocols and software, such as SSH, IPsec...