{"id":3267,"date":"2025-10-07T21:00:25","date_gmt":"2025-10-07T14:00:25","guid":{"rendered":"https:\/\/kienthucmo.com\/understanding-http-and-https-differences-and-their-role-in-website-security\/"},"modified":"2026-01-24T21:47:16","modified_gmt":"2026-01-24T14:47:16","slug":"understanding-http-and-https-differences-and-their-role-in-website-security","status":"publish","type":"post","link":"https:\/\/kienthucmo.com\/en\/understanding-http-and-https-differences-and-their-role-in-website-security\/","title":{"rendered":"Understanding HTTP and HTTPS: Differences and Their Role in Website Security"},"content":{"rendered":"\n

In the era of rapid Internet development, the transmission of information between devices has become extremely important. When accessing a website, you often encounter two common protocols: HTTP and HTTPS. But how exactly do they differ? How does HTTP work, what makes HTTPS special, and why has security become such an important factor for websites today?<\/p>\n\n\n\n

In this article, I will explore these two protocols in depth with you. We will examine their operating mechanisms, advantages and disadvantages, how to distinguish between them, as well as key considerations when deploying a secure website. Let\u2019s get started.<\/p>\n\n\n

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\"T\u00ecm<\/figure>\n<\/div>\n\n\n

1. What Is HTTP?<\/h2>\n\n\n\n

HTTP (HyperText Transfer Protocol) is a protocol used to exchange information between a client (typically a web browser) and a server on the Internet. It enables data to be sent and received in the form of requests and responses and serves as the fundamental foundation of the World Wide Web. Whenever you access a website, all data such as text, images, and videos are transmitted via HTTP (or HTTPS).<\/p>\n\n\n

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\"HTTP<\/figure>\n<\/div>\n\n\n

Basic Operating Mechanism:<\/strong><\/p>\n\n\n\n

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  1. Client sends a request:<\/strong> When you enter a website address or click a link, the browser creates an HTTP request. This request includes information such as the URL being accessed, the HTTP method (GET, POST, etc.), headers (details about the browser, cookies, and more), and sometimes a body containing data to be sent.<\/li>\n\n\n\n
  2. Server processes the request:<\/strong> The server receives the request, analyzes the information, retrieves the necessary data (such as an HTML page, images, or JSON data), and generates an HTTP response. The response includes a status code indicating the result, headers containing metadata about the returned data, and a body with the actual content.<\/li>\n\n\n\n
  3. Client receives the response:<\/strong> The browser receives the response, reads the headers and body, and then displays the website content to the user. This process occurs very quickly – often within milliseconds – allowing the website to load almost instantly.<\/li>\n<\/ol>\n\n\n\n

    Thanks to this request \u2013 response mechanism, HTTP enables efficient communication between users and servers; however, it is important to note that the transmitted information is not encrypted.<\/p>\n\n\n\n

    2. What Is HTTPS?<\/h2>\n\n\n\n

    HTTPS (HyperText Transfer Protocol Secure)<\/strong> is the secure version of HTTP. It uses SSL\/TLS to encrypt data before it is transmitted over the Internet, helping to protect sensitive information and ensuring that data cannot be read or altered by malicious actors. HTTPS also authenticates the server\u2019s identity, giving users confidence that they are connecting to a legitimate website.<\/p>\n\n\n\n

    \"HTTPS<\/figure>\n\n\n\n

    Basic Operating Mechanism:<\/strong><\/p>\n\n\n\n

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    1. Client requests a secure connection:<\/strong> When you access a website using HTTPS, the browser sends a request to establish a secure connection with the server.<\/li>\n\n\n\n
    2. Server sends an SSL\/TLS certificate:<\/strong> The server provides a certificate to verify its identity, proving that it is a legitimate website.<\/li>\n\n\n\n
    3. Session key exchange:<\/strong> The client and server negotiate a temporary encryption key (session key) to be used during the communication session.<\/li>\n\n\n\n
    4. Encrypted data transmission:<\/strong> All requests and responses within the session are encrypted, ensuring data confidentiality and integrity.<\/li>\n<\/ol>\n\n\n\n

      Key advantages of HTTPS:<\/strong><\/p>\n\n\n\n