Differences Between HTTP and HTTPS Protocols

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HTTP and HTTPS are two very common protocols, and today we will briefly explore their main differences.

HTTP, or Hypertext Transfer Protocol, operates at the seventh layer of the OSI model and is primarily responsible for communication between clients (such as browsers) and servers. It defines the format of requests and responses, allowing clients to request resources (such as web pages, images, files, etc.) and servers to return the corresponding resources or status information.

HTTPS can be considered a secure upgrade of HTTP, primarily achieved by adding an SSL/TLS protocol layer between HTTP and TCP to enable secure transmission.

Below are the detailed differences between the two protocols:

Feature	HTTP	HTTPS
Protocol Basis	Based on TCP, no encryption	Based on TCP, encrypted via SSL/TLS
Data Security	Plain text transmission, vulnerable to eavesdropping and tampering	Encrypted transmission, strong data confidentiality, prevents tampering and man-in-the-middle attacks
Authentication	Cannot verify server and client identities	Can verify server and client identities through digital certificates
Cost	No additional cost	Requires purchase of SSL certificate, increasing configuration and maintenance costs
Application Scenarios	Suitable for ordinary applications with low security requirements	Suitable for e-commerce, finance, payment, and other websites with high security requirements

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