What is SSL Certificate? HTTPS and Secure Internet Communication

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Popular SSL Certificate Brands

Comodo SSL: It is a brand widely used worldwide with certificates such as EssentialSSL and InstantSSL.

GeoTrust: It is a brand that offers SSL certificates and digital security services. It has high quality certificates that comply with industry standards.

Symantec: One of the world's largest security companies and offers many digital security services, including SSL certificates.

GlobalSign: A brand that provides SSL certificates, digital signatures and digital security services. It has the ability to offer a single certificate for multiple domains or subdomains.

DigiCert: A brand that provides SSL certificates and other digital security services. It has certificates compatible with widely accepted security protocols.

These brands are just a few of the leading brands that offer reliable and quality service in SSL certificates. Pricing can vary in terms of features and services, so it is important for website owners to choose an SSL certificate brand that suits their needs and budget.


What is SSL Working Principle?

SSL (Secure Sockets Layer) is a security protocol that enables encryption of information by establishing a secure connection between websites and users.

The working principle of SSL is based on a key encryption system for encrypting data on the website. The website owner first generates a private key, which is sent to a third-party SSL certificate provider. The SSL certificate provider verifies the identity of the website owner and issues a digital certificate.

When the user accesses the website, their browser checks the SSL certificate of the website. If the certificate is verified, a secure connection is established between the user's browser and the website. This connection ensures that the data sent by the website is encrypted and transmitted to the user's browser.

The SSL certificate allows users to verify that the website is trustworthy and to know that their information is encrypted. The working principle of SSL includes the following steps to encrypt data and ensure secure communication:

A connection request is sent by the client (browser) to the website.
The website generates a private key on the server side and requests a digital certificate with this key.
The SSL certificate provider authenticates the website and generates a digital certificate. The certificate contains the website name, certificate owner information, certificate duration and other information.
The SSL certificate is sent back to the website and stored on the server side by the website.
The client (browser) checks the SSL certificate when connecting to the website. If the certificate is valid and trusted, a handshake protocol is performed between the client and the server to establish a secure connection.
During this handshake protocol, the client and server together determine a secure encryption algorithm and key. Using this algorithm and key, the data is encrypted and the communication becomes secure.
The website sends encrypted data to the client, which is then analysed by the client.
Thanks to encryption, the transmitted data becomes difficult to read by third parties.

This process enables users to communicate securely with the website and their data is encrypted and protected. SSL certificates are vital to ensure the security of sensitive data such as information exchange, login, payment transactions on the internet.