What is an SSL certificate?

An SSL (Secure Sockets Layer) certificate is a cryptographic data file that establishes a secure connection between a web server and a browser. It is used to ensure that data exchanged between the server and the browser is protected against malicious attacks such as interception, tampering or data theft.

SSL certificates contain information about the identity of the website, such as the domain name and IP address, as well as the public key of the server. When a user visits a secure website, the browser establishes a connection with the server and verifies the authenticity of the SSL certificate. If the certificate is valid and matches the identity of the site, the secure connection is established.

How does an SSL certificate work?

The process of how an SSL certificate works is quite simple. When a user connects to a secure website, his browser sends a connection request to the web server. The server responds with its SSL certificate, which contains its public key. The browser verifies the authenticity of the certificate by checking it against a trusted Certificate Authority (CA), which is a third-party entity that verifies the identity of websites.

If the certificate is validated, the browser and server exchange a secret session key that is used to encrypt all data exchanged between them. This session key is unique to each connection and can only be decrypted by both parties involved in the communication.

Why are SSL Certificates important today?

SSL Certificates are essential for online security today because they protect users from malicious attacks such as data theft and traffic interception. Without an SSL certificate, data exchanged between a browser and a server can be easily intercepted and read by hackers.

SSL certificates are also important for data privacy. They ensure that data exchanged between a browser and a server is protected by strong encryption, which prevents third parties from reading it.

In addition, SSL certificates are also important for user trust. Secure websites display a padlock symbol in the browser’s address bar, which indicates that the connection is secure and that the data exchanged is protected.