FAQs Archive - SSL.com

What is a Fully Qualified Domain Name (FQDN)?

A comprehensive guide to Fully Qualified Domain Names (FQDNs), covering structure, best practices for SSL/TLS certificates, troubleshooting common errors, and key differences from URLs and PQDNs.

How to Verify an RSA Private Key Matches a CSR and Certificate

A comprehensive guide explaining how to verify that your RSA private key matches your Certificate Signing Request (CSR) and SSL/TLS certificate using OpenSSL commands and modulus comparison techniques.

Switching to SSL.com from Another SSL Provider or Hosting Service

This guide explains how to change your SSL certificate provider to SSL.com. As a website owner, you have the right to choose any SSL provider

Certificate Management

What is a Site Seal?

Discover SSL.com Smart Seal: A free, innovative site seal offering real-time reports and validated documents. Enhance your website’s security and build visitor trust today.

eSigner FAQ

Frequently asked questions about SSL.com’s eSigner cloud document and code signing service.

How Do I Revalidate an Expired Domain?

How to revalidate an expired domain name, so you can continue ordering certificates for it from SSL.com.

FAQ: Extended Validation (EV) Process

Frequently asked questions about the process of validating and issuing Extended Validation (EV) certificates from SSL.com

What if my EV Code Signing token is blank?

Steps you should take to install your certificate if you received a blank EV Code Signing token.

Underscores Not Allowed in Domain Names

Following CA/B Forum Ballot SC12, publicly trusted CAs cannot issue SSL/TLS certificates for subdomains containing underscore (_) characters.

Which ACME Challenge Type Should I Use? HTTP-01 or DNS-01?

Not sure if you should use the HTTP-01 or DNS-01 ACME challenge? This FAQ outlines the advantages and disadvantages of both DV methods.

What Is the ACME Protocol?

Automated Certificate Management Environment (ACME) is a standard protocol for automated management of X.509 certificates.

FAQ: Expired Document Signing Certificates

Frequently asked questions about expired document signing certificates.

FAQ: Expired Code Signing Certificates

Frequently asked questions about expired code signing certificates.

FAQ: Expired S/MIME Certificates

Frequently asked questions about how expired S/MIME certificates affect signed and encrypted email.

FAQ: Network Attacks and Security Issues

FAQ on network attacks and securitity issues, especially as they pertain to SSL/TLS, PKI, and digital certificates.

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.

FAQ: Digital Certificate Revocation

FAQ covering common methods for communicating information about digital certificate revocation: CRL, OCSP, OCSP Stapling and Must-Staple, and CRLite.

FAQ: Compromised Private Keys

Think your key might be compromised? This might be an emergency, but it might just be a chance to re-key your certificate. Find out how to move forward here.

What is a Digital Certificate?

A digital certificate is a type of file used to associate cryptographic key pairs with identities such as websites, individuals, or organizations.

FAQ: Getting Started With Your Code Signing Certificate

This FAQ answers common questions about getting started signing files with your SSL.com EV Code Signing certificate and YubiKey FIPS token.

FAQ: Kernel-Mode Code Signing Certificates

This FAQ answers common questions developers may have about getting started with kernel-mode code signing in Windows.

What is the “unique value” used in domain validation (DV)?

The “unique value” used in domain validation (DV) is a random or user-supplied value used to ensure the uniqueness of the DV request.

FAQ: Getting Started With Your Business Identity Certificate

This FAQ answers common questions about getting started signing documents and email with SSL.com’s Business Identity Certificate and YubiKey FIPS token.

What is a Wildcard SSL Certificate?

A Wildcard SSL/TLS certificate from SSL.com offers convenience, affordability, and saves time when protecting multiple subdomains.

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