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OpenSSL

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May 1, 2024 Updated May 12, 2025 21 minute read

OpenSSL is a software library that applications use to secure communications over computer networks. It provides an open-source implementation of the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols. Essentially, it's a foundational toolkit for encrypting internet traffic, ensuring that data exchanged between a user's computer and a website, or between any two networked devices, remains private and integral. The vast majority of HTTPS websites rely on OpenSSL to secure their connections. You'll find OpenSSL at work in web servers, virtual private networks (VPNs), and email encryption, making it a cornerstone of modern internet security.

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Reading list

We've selected eight books that we think will supplement your learning. Use these to develop background knowledge, enrich your coursework, and gain a deeper understanding of the topics covered in OpenSSL.
Is written by one of the original developers of OpenSSL and provides a comprehensive overview of the project's history, design, and implementation. It valuable resource for anyone who wants to learn more about the inner workings of OpenSSL.
This comprehensive guide to network security using OpenSSL covers transport layer security, virtual private networks, and secure email.
This cookbook provides practical recipes for secure programming in C and C++, including examples of using OpenSSL.
Prepares readers for the Certified Secure Software Developer certification, covering topics such as OpenSSL usage and cryptography.
Provides a detailed guide to using OpenSSL for security purposes. It valuable resource for developers who want to learn how to use OpenSSL to build secure applications.
While not specifically about OpenSSL, this book includes a chapter on implementing TLS using OpenSSL, providing insights into practical applications.
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