Online Security: What Is an SSL Certificate and How Does It Work?

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An SSL certificate is a sign of security and reliability for a website. It is essential for anyone who wants to effectively promote their site online, as Google officially announced in 2020 that having such a certificate will impact ranking. So, what is it, how to get it, and how to use it?

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What Is an SSL Certificate?

SSL (Secure Sockets Layer) is a cryptographic protocol that provides a secure connection between a web server (website) and a user’s browser. It ensures that information transmitted between them remains confidential and protected from interception and theft.

This digital document verifies the identity of the website and enables SSL encryption. The certificate contains encryption keys used to protect data transmitted between the user and the server. So, if a website uses SSL, you can safely provide your contact details and even your bank card’s CVV on it!

How Does SSL Encryption Work?

SSL operates on symmetric and asymmetric encryption principles.

1. Connection Establishment: The user’s browser and web server exchange encryption keys.
2. Data Encryption: The browser uses the encryption key to encrypt data sent to the server.
3. Data Transmission: Encrypted data is transmitted over the Internet.
4. Data Decryption: The web server uses its encryption key to decrypt the data received from the browser.

Thus, information remains confidential during network transmission. There’s no need to fear these technical terms. You don’t need to do anything; the process happens automatically.

Why Is an SSL Certificate Needed?

An SSL certificate is a digital document that verifies the identity of the website owner and ensures a secure connection. It contains:

• Information about the website owner: Organization name, website address, and other details.
• Public Key: An encryption key used to encrypt data sent to the website.
• Digital Signature: An electronic signature ensuring the certificate hasn’t been tampered with.

SSL certificates not only provide security but also enhance user trust in the site, as they indicate that the portal meets established security standards.

What Types of SSL Certificates Are There, and Which One Is Better?

There are many types of certificates, but whichever you choose, you need to go through verification after purchase. This is necessary to avoid purchasing certificates from scammers.

SSL certificates can be categorized by verification type:

• Domain Validation (DV): This is the simplest and most common type. It offers a low level of protection and requires only domain ownership verification. Recommended for small websites with no user data input or simple contact forms, and unsuitable for sites with financial transactions.
• Organization Validation (OV): This certificate verifies both the domain and the organization’s registration, confirming the right to conduct business. You will need to provide documents about business registration and site relevance. It may take up to 3 days to obtain but is more reliable than DV. Suitable for sites with online purchases and user data storage.
• Extended Validation (EV): Available only to legal entities. You must provide all registration documents. It offers the highest level of protection and is used for major projects with financial components, such as banks, marketplaces, and transportation companies. It may take up to 2 weeks to receive.

By certificate type of coverage:

• Single-Domain: Covers only one domain or subdomain.
• Multi-Domain (SAN/UCC): Applies to multiple domains of the same company.

Wildcard (WC): Protects the domain and all its subdomains, both existing and future.

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Recommend that you also read: What is Phishing in Simple Terms? How to Protect Yourself from It

How to Choose a Certificate?

When selecting an SSL certificate, consider:

• Level of Validation: DV SSL is suitable for sites that don’t handle confidential information. OV SSL and EV SSL are recommended for sites processing payment data, personal information, or other sensitive data.
• Price: The cost of an SSL certificate depends on the level of validation and other factors.
• Compatibility: Ensure the SSL certificate is compatible with your web server.

Additional criteria to help you choose the right certificate:

• Code Signing SSL: For companies developing and selling software.
• SGC Certificate: With enforced high-level encryption, for financial institutions.
• IDN Certificates: Supporting Cyrillic domains.

You can also use different types of certificates for your domain.

How to Install an SSL Certificate?

After purchasing a certificate, you need to activate and install it. To activate, fill out detailed domain information and submit a request on the vendor’s site. After activation, install the SSL certificate in your hosting control panel.

SSL is a key element for ensuring website security and protecting users’ confidential information during their interactions with the site. By choosing the right SSL certificate and configuring it properly, you can ensure a high level of security for your website.

How to Install an SSL Certificate on a Website – Video

If you are interested in how to install an SSL certificate on your website, watch the detailed instructions in the video:

Conclusion

An SSL certificate is an important element for the secure operation of websites and the protection of users’ personal data. Using a certificate not only increases security, but also contributes to the trust of visitors and improves search engine rankings. The choice of an SSL certificate depends on the type of website and the level of protection required, and its correct installation will ensure the security and reliability of your web resource.

Frequently Asked Questions About SSL Certificate