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SSL: What It Is and Why We Use HTTPS

What is SSL?

SSL is a standard security protocol essential for establishing encrypted links between a web server and a browser in an online communication. The use of SSL technology ensures that all data transmitted between the web server and browser remains encrypted and private.

SSL has evolved over the years, with TLS now being the standard technology used for securing web connections. However, the term "SSL" continues to be widely used interchangeably with TLS.


What is SSL?


How Does SSL Work?

SSL operates by using a combination of asymmetric and symmetric encryption. Asymmetric encryption is used to establish a secure connection, while symmetric encryption is used for the remainder of the communication after the secure connection has been established.

  1. SSL Handshake: When you visit an HTTPS website, your browser and the server perform an "SSL handshake." This involves the exchange of public keys and the creation of shared secrets, establishing a secure connection before any data is transferred.

  2. Encryption: After the secure connection is established, all data transmitted between your browser and the server is encrypted. This means that even if the data is intercepted, it cannot be deciphered without the encryption key.

  3. Authentication: SSL certificates also authenticate the identity of websites, ensuring that users are not connecting to fraudulent sites. When a browser connects to an SSL-secured website, it will verify the SSL certificate issued by a trusted Certificate Authority (CA). If the certificate is valid, the browser will proceed to establish a secure connection.

Why Use HTTPS?

1. Data Security

The primary reason for using HTTPS is to secure data in transit. This is especially critical for websites that handle sensitive information like passwords, credit card numbers, and personal information, ensuring that data is not intercepted or tampered with.

2. Authentication

HTTPS also provides authentication, ensuring that users are communicating with the intended website. This is crucial for preventing man-in-the-middle attacks, where attackers can impersonate a website to intercept or alter the communication.

3. SEO Benefits

Search engines, particularly Google, favor HTTPS websites by giving them a ranking boost. This means that switching to HTTPS can also improve your website's visibility and search engine ranking.

4. Building Trust

Websites secured with HTTPS display a padlock icon in the address bar, signaling to users that the connection is secure. This builds user trust, which is vital for e-commerce sites and any platform requiring users to share personal information.


SSL/TLS and HTTPS are foundational to internet security, safeguarding data integrity and privacy across billions of connections every day. By encrypting data and providing authentication, HTTPS not only protects against data breaches and cyber threats but also builds trust with users, enhances SEO, and is increasingly becoming a requirement for all websites. As digital threats continue to evolve, the importance of SSL and the widespread adoption of HTTPS will only grow, marking a continued commitment to secure, trustworthy internet experiences for all users.