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 digital signature algorithms supported by OpenSSL

In this section, we will review the digital signature algorithms that are supported by OpenSSL and give some recommendations on which algorithms to use.

Reviewing RSA

The Rivest-Shamir-Adleman (RSA) algorithm was invented by Ronald Rivest, Adi Shamir, and Leonard Adleman. Ronald Rivest is the same person who invented symmetric encryption algorithms from the RC family and message digest algorithms from the MD family. The RSA algorithm was first published in 1977. It was the first popular asymmetric crypto algorithm.

RSA is quite a universal algorithm since it can both encrypt and sign messages. RSA is the slowest algorithm to sign but the fastest to verify for the same security level among the digital signature algorithms provided by OpenSSL.

The speed of both signing and verification depends on the key size. The signing speed quickly drops with the growth of the key size. The verification speed also drops, but...