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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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How to generate a symmetric encryption key

Generating an encryption key for symmetric encryption is surprisingly easy. You just request the needed amount of random bytes from your cryptographically secure random generator!

Which random generator is considered cryptographically secure? It is a random generator that generates bytes that are extremely hard to predict. The unpredictability of generated random bytes is accomplished by using the entropy caused by unpredictable events from the outside world. Often, cryptographically secure random generators use the entropy caused by the unpredictable timing of the input from a keyboard and mouse. If the keyboard and mouse are unavailable, for example, when an application is running in a container, then another source of entropy can be used, such as microfluctuations in the CPU speed. Another common entropy source is a ring oscillator that can be included in the CPU or another chip.

What is the correct amount of random bytes? It is the...

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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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