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You're reading from  Demystifying Cryptography with OpenSSL 3.0

Product typeBook
Published inOct 2022
PublisherPackt
ISBN-139781800560345
Edition1st Edition
Tools
Wireshark
Concepts
Cryptography
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Author (1)
Alexei Khlebnikov
Alexei Khlebnikov
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Alexei Khlebnikov

Alexei Khlebnikov has more than 20 years of professional experience in IT, where he worked in different roles - software developer, system administrator, DevOps engineer, technical leader, architect and project manager. During those years Alexei worked with many technologies - Security, Artificial Intelligence, Web Development, Embedded, Mobile, and Robotics. Among other companies, Alexei worked in Opera Software on the famous Opera Internet browser. Alexei has always been interested in security. He was one of the maintainers of security-related Opera browser modules, responsible for cryptography, SSL/TLS and integration with OpenSSL. He was also a member of the Security Architects group, responsible for the security of the Opera browser. Now Alexei lives in Oslo, Norway, and works as a senior consultant for Bespoke AS. He is also the leader of the Architects group at his current employer.
Read more about Alexei Khlebnikov

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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...

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Demystifying Cryptography with OpenSSL 3.0
Published in: Oct 2022Publisher: PacktISBN-13: 9781800560345
© 2022 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Alexei Khlebnikov

Alexei Khlebnikov has more than 20 years of professional experience in IT, where he worked in different roles - software developer, system administrator, DevOps engineer, technical leader, architect and project manager. During those years Alexei worked with many technologies - Security, Artificial Intelligence, Web Development, Embedded, Mobile, and Robotics. Among other companies, Alexei worked in Opera Software on the famous Opera Internet browser. Alexei has always been interested in security. He was one of the maintainers of security-related Opera browser modules, responsible for cryptography, SSL/TLS and integration with OpenSSL. He was also a member of the Security Architects group, responsible for the security of the Opera browser. Now Alexei lives in Oslo, Norway, and works as a senior consultant for Bespoke AS. He is also the leader of the Architects group at his current employer.
Read more about Alexei Khlebnikov

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