Certificate Renewal and the DCV 200-Day Domain Reuse Policy: What Changes for Renewals
Is your certificate renewal asking for domain validation again? Learn how the 200-day DCV reuse limit affects renewals and how to avoid a certificate lapse.
Category: SSL/TLS
Which Digital Certificates Require a Hardware Token or HSM
Wondering if your certificate needs a hardware token or HSM? Learn which SSL.com certificates require hardware and which you can download as a PFX file.
Ordering and Retrieving SSL/TLS Certificates
How to order SSL/TLS certificates from SSL.com, including the Domain Validation (DV) process and High Assurance/EV document submission.
Acceptable Business Listings for Validation
Validation and Callback Issuing a digital certificate is a carefully-structured process which includes you, the customer, providing pertinent information confirming your identity and choosing the
Install Intermediate Certificates To Avoid SSL/TLS Not Trusted
Broken SSL/TLS certificate chains from missing intermediates can cause trust errors. Learn how to diagnose and fix them by installing a complete chain.
The Essential Guide to Multi-Domain (UCC/SAN) Certificates
Learn about multi-domain (UCC/SAN) certificates that secure multiple domains with a single SSL/TLS certificate. Discover benefits, implementation steps, best practices, and troubleshooting tips for efficiently managing your organization’s domain security needs.
What is HTTPS?
HTTPS (Hypertext Transfer Protocol Secure) is a secure version of the HTTP protocol that uses the SSL/TLS protocol to encrypt data sent between a web browser and a website.
What Are The Requirements for SSL.com SSL/TLS Certificate Domain Validation?
Domain Validation methods and options for all SSL/TLS certificates.
Removal of the Client Authentication EKU from TLS Server Certificates – What You Need to Know
Overview Since September 15, 2025, SSL.com’s TLS server certificates have been issued without the Client Authentication extended key usage (EKU) extension. This change was guided
Install SSL Certificates on Zeus Webserver
This article will provide detailed instructions on installing certificates on the Zeus Webserver. Upon receiving your certificates, you will have three files. Begin by opening
An Introduction to Certification Authority Authorization (CAA)
SSL.com’s in-depth look at Certification Authority Authorization (CAA) and how it can help protect your website, your business – and your online reputation.
Created by the Internet Engineering Task Force (IETF) and described in RFC 6844, CAA lets the owner of a domain name authorize designated and specific Certification Authorities (CAs) to issue SSL certificates for their domain name.
Understanding CAA Check Failures and How to Resolve Them
Learn how to fix CAA check failures and secure your domain. This guide covers common issues, DNSSEC errors, and actionable solutions for TLS certificates.
Why Law Firms Should Invest More in Cybersecurity
Explore why law firms must prioritize cybersecurity investments today. Learn about unique vulnerabilities, rising cyber threats, essential security measures, and the business case for protecting sensitive legal data.
What is an SSL/TLS Certificate?
Learn about SSL certificates: what they are, how they work, and why they’re crucial for website security. Explore types, benefits, and implementation.
What is HTTP Strict Transport Security (HSTS)?
Learn about HTTP Strict Transport Security (HSTS), a crucial web security mechanism that enforces HTTPS connections. Discover its benefits, implementation steps, and best practices for protecting your website against common attacks.
Unified Communications Certificate (UCC): A Comprehensive Guide
Learn about Unified Communications Certificates (UCCs), how they secure multiple domains, their benefits, and best practices for implementation and management.
What is a Root Store?
Root stores: Key components of internet security. Learn about these trusted certificate collections and their role in cybersecurity.
What is a Wildcard SSL Certificate?
Wildcard SSL Certificates secure multiple subdomains under one domain. This article explains their function and best uses.
What is the “Unique Value” Used in Domain Validation (DV)?
Domain Validation (DV) is a crucial step in obtaining an SSL/TLS certificate for your website. A key component of this process is the “unique value” used to verify domain ownership.
SSL Certificate Expiration Guide
Why do SSL Certificates Expire? Think of an SSL certificate as a passport for your website, verifying its identity and ensuring secure connections. Just as
Automatically Generate Unique IoT Device Certificates Using Prevalidated Domains
Introduction: SSL.com provides a domain prevalidation capability that speeds up the process to issue certificates. The process is extended to all subdomains to the left
What is a Certificate Authority (CA)?
A certificate authority (CA) is a trusted organization that verifies the identity of a website, person, or company, then issues a digital certificate confirming that
What Is Certificate Pinning?
What is Certificate Pinning? Chrome dropped support for browser-based certificate pinning back in 2018. Mobile apps kept pinning anyway, and a wave of shorter certificate
SSL/TLS Handshake: Ensuring Secure Online Interactions
Whenever we visit a website, make an online purchase, or check our email, data is transmitted back and forth between our devices and remote servers.
Preparing Your Organization for the Quantum Revolution: A Guide to Implementing Post-Quantum Cryptography
Quantum computers will be potent and pose a massive threat to encrypting data as we know it. Here at SSL.com, we are on top of
