Practical OpenSSL: Manage Certificates and Secure Connections

Securing web traffic and protecting sensitive data is a fundamental requirement for any modern online system. This text-based course provides a clear, step-by-step path to understanding public key infrastructure (PKI) and mastering the OpenSSL command-line utility. You will gain the confidence to generate, inspect, and troubleshoot digital certificates and cryptographic keys on your own. Through clear written explanations and practical command-line examples, you will learn how to handle real-world security tasks and implement modern encryption standards. You will transition from a beginner to a practitioner capable of securing web servers and debugging connection issues. What you'll learn: - Understand core cryptographic concepts, asymmetric encryption, and public key infrastructure. - Generate secure private keys using both traditional RSA and modern Elliptic Curve (ECC) algorithms. - Create and sign Certificate Signing Requests (CSRs) for local and public trust. - Verify, inspect, and convert certificate formats including PEM, DER, and PKCS#12. - Test and troubleshoot secure TLS connections using the OpenSSL s_client tool. - Implement modern security standards including TLS 1.3 and secure cipher selection. This course begins with essential definitions and foundational security concepts, ensuring you understand the 'why' before moving on to practical terminal commands. You will then progress through structured written scenarios that demonstrate how to manage certificates, build local certificate authorities, and analyze secure handshakes. This course is designed for beginner system administrators, web developers, and cybersecurity enthusiasts who need to manage certificates. No prior experience with cryptography or command-line security tools is required. Start reading today to build a strong foundation in modern digital security.