What is an SSL Certificate and How does it Work? (2024)

For the Internet: What do SSL certificates do for websites?

When a signed SSL certificate secures a website, it proves that the organization has verified and authenticated its identity with the trusted third party; since the browser trusts the CA, the browser now trusts that organization’s identity too.

The easiest way to check if the website has an SSL installed is to look at your browser; see if the website URL starts with “HTTPS:” as this shows if it has an SSL certificate installed on the server. If so, click the padlock icon in the address bar to view the certificate information.

Historically, web browsers use HyperText Transfer Protocol (HTTP) to connect to web servers that listen on TCP port 80 by default. HTTP is a plain-text protocol, which means it is relatively easy for a hacker to intercept and read the transit data. Due to the proliferation of phishing, Google’s Chrome browser, among others, now redirects to HTTPS by default.

SSL uses port number 443, encrypting data exchanged between the browser and the server and authenticating the user. Therefore, when the communications between the web browser and server need to be secure, the browser automatically switches to SSL — that is, as long as the server has an SSL certificate installed.

Establishing a connection with a server with a certificate signed by a trusted CA takes place without additional difficulties for the user. When an internet user visits an SSL-secured website, they are more willing to submit their contact information or shop with their credit card. Furthermore, having an SSL certificate on your website increases your ranking position, making it easier for users and customers to find your site.

SSL certificate attests to the reliability of a website, but with more advanced certificates, the entire company can be SSL certified.

What is an SSL Certificate and How does it Work? (2024)

FAQs

What is an SSL Certificate and How does it Work? ›

An SSL certificate (or TLS certificate) is a digital certificate that binds a cryptographic key to your organization's details. Secure Sockets Layer (SSL) are cryptographic protocols designed to encrypt communication between a server and a web browser.

What is an SSL certificate and how does it work? ›

SSL certificates are what enable websites to use HTTPS, which is more secure than HTTP. An SSL certificate is a data file hosted in a website's origin server. SSL certificates make SSL/TLS encryption possible, and they contain the website's public key and the website's identity, along with related information.

What is SSL in layman's terms? ›

SSL: Secure Sockets Layer

SSL is standard technology for securing an internet connection by encrypting data sent between a website and a browser (or between two servers). It prevents hackers from seeing or stealing any information transferred, including personal or financial data.

What is the SSL protocol and how does it work? ›

SSL ensures the data that is transferred between a client and a server remains private. This protocol enables the client to authenticate the identity of the server. When your server has a digital certificate, SSL-enabled browsers can communicate securely with your server, using SSL.

What happens if you don't have an SSL certificate? ›

Your website needs any SSL certificate If you're asking for any personal information. But that's not all there is to it. Search engines are cracking down on perceived 'non-secure' websites. Any websites without the SSL certificate will remain http while those with encryption will show https in users' browsers.

Do I really need a SSL certificate for my website? ›

To run a successful business website, you need an SSL certificate to prevent traffic interruption. Even if you don't collect any information from your website visitors, your website requires an SSL certificate to prevent customers from getting a pop-up that indicates your website is unsecured.

What is SSL in one sentence? ›

Secure Sockets Layer (SSL) is a security protocol that provides privacy, authentication, and integrity to Internet communications.

What are the 3 types of SSL? ›

There are three types of SSL Certificate available today; Extended Validation (EV SSL), Organization Validated (OV SSL) and Domain Validated (DV SSL).

What does SSL mean work? ›

Sick and Safe Leave (SSL) Leave and Accommodations. Accommodations. Advanced Leave Options (Staff) Bereavement Leave.

Where would I use an SSL certificate? ›

Companies and organizations need to add SSL certificates to their websites to secure online transactions and keep customer information private and secure. In short: SSL keeps internet connections secure and prevents criminals from reading or modifying information transferred between two systems.

How does SSL work between two servers? ›

SSL comprises two separate protocols: The Handshake protocol authenticates the server (and optionally the client), negotiates crypto suites, and generates the shared key. The Record protocol isolates each connection and uses the shared key to secure communications for the remainder of the session.

What happens when an SSL certificate expires? ›

Once your certificate expires, site visitors will encounter the "Your connection is not private" message. All further communication will be displayed in plaintext and therefore, will no longer be encrypted.

How much does an SSL certificate cost? ›

On average, a Secure Sockets Layer (SSL) certificate costs around $60/year. However, the price can vary from $8 to $1000/year, depending on various factors, such as the number of domains one can protect, the validation process, the warranty, or the certificate authority itself.

Is it worth paying for SSL certificate? ›

They can potentially inhibit your websites from performing at their optimal conditions. That's why investing in paid SSL certificates provides additional protection and a different level of security for eCommerce websites regardless of your size.

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