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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 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...

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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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