Category SSL

Understanding PEM and DER File Formats

Understanding the differences between PEM and DER file formats is important for handling SSL/TLS certificates, as they are two of the most commonly used formats for storing these certificates and keys. Here’s an overview of each format: PEM Format DER…

Understanding X509 Certificate with Openssl Command

X.509 is a standard format for public key certificates, digital documents that securely associate cryptographic key pairs with identities such as websites, individuals, or organizations. It can be used for authenticated and encrypted web browsing, signed and encrypted email etc.…

Check SSL Certificate with OpenSSL in Linux

OpenSSL is an open-source command-line tool that is commonly used to generate private keys, create CSRs, install our SSL/TLS certificate, and identify certificate information. This quick reference can help us understand the most common OpenSSL commands and how to use…