What Is an SSL Certificate, and How Do You Get One?

SSL certificates are standard security infrastructure for corporate sites, online stores, financial institutions, personal blogs and information websites. What are they, why are they useful, and how do you apply for one? This article explains the essentials.

1. What is an SSL certificate?

An SSL certificate is a digital certificate used to help protect data transmitted over a network. Installed on a server, it supports secure HTTPS access and is also called a server certificate or HTTPS certificate. “SSL” stands for Secure Sockets Layer; although the product name remains common, modern secure connections use its successor, TLS, rather than obsolete SSL protocols.

A certificate authority (CA) issues a certificate after the applicable identity or domain-control checks. During connection setup, the certificate helps authenticate the server and establish the encrypted TLS channel between the client browser and web server. This protects the confidentiality and integrity of information exchanged over that connection.

2. What does an SSL certificate do?

1. Protect sensitive information. TLS encrypts data in transit and helps prevent interception and undetected modification.
2. Support identity verification. Certificates authenticate covered domain names, and OV/EV certificates also contain verified organization information. This helps identity checking but does not make every HTTPS site legitimate or stop all phishing.
3. Avoid insecure-connection warnings. Correctly configured HTTPS avoids warnings associated with plaintext HTTP. The green padlock mentioned in the original article is not universal: browser interfaces vary, and Chrome has replaced the padlock with site controls.
4. Build user confidence. A protected HTTPS connection can make visitors more comfortable using a service, although connection security is not an endorsement of the business.
5. Support technical SEO. The original article mentions Google and Baidu. Google has described HTTPS as a lightweight ranking signal; installing a certificate does not guarantee better rankings or traffic.
6. Contribute to compliance. Encryption may help meet applicable requirements under China’s Cybersecurity Law and MLPS 2.0 framework, or payment security requirements such as PCI DSS. These are different legal and industry frameworks, and a certificate alone does not establish compliance.

3. How do you apply for an SSL certificate?

Step 1: Choose a certificate that meets your needs

The three principal validation categories are:

• Domain Validation (DV): Verifies control of a domain. Issuance can often take minutes after validation. Suitable for personal blogs and informational sites.
• Organization Validation (OV): Adds checks on the organization, for example its registration documents. Organization information appears in certificate details. Suitable for corporate sites and many e-commerce services.
• Extended Validation (EV): Requires more extensive organizational identity verification. Often considered by banks, financial services and larger online businesses with additional identity-assurance requirements.

Coverage is a separate dimension: single-domain certificates, multi-domain certificates and wildcard certificates. A wildcard protects subdomains at one level; the base domain must be included separately to be covered. Ordinary public-domain EV certificates do not offer wildcard coverage.

Once you have selected a type, open the relevant product page on the sslTrus website and follow its purchase or consultation link. The international site routes business inquiries and supported purchases to NicSRS.

Step 2: Generate and submit a CSR

Complete the CA’s application with the required domain, organization and contact information. Generate a certificate signing request (CSR) on the server or through the provider’s supported process. If one-click CSR generation is offered, retain the matching key file securely. Never disclose the private key unnecessarily.

Step 3: Complete the CA’s checks

The CA verifies the submitted information. DV requires domain-control validation; OV and EV additionally require checks on organizational identity.

Step 4: Download and install the certificate

After successful validation, the CA issues the certificate. Depending on the provider, it may arrive at the application email address or become available for download when the order is marked as issued. Install the certificate and required intermediate chain according to the server’s instructions.

Installation guidance for IIS, Nginx, Apache and Tomcat is available through technical support. Use the instructions appropriate to your server and certificate product.

SSL/TLS certificates are an important part of protecting user data and maintaining confidence in online services. Personal and enterprise website owners should understand the available options, obtain a suitable certificate and keep it correctly deployed and renewed.

For further questions or assistance, please contact us.