HTTPS (HyperText Transfer Protocol Secure) is the secure version of HTTP. It is used to transfer data between a web browser and a server while ensuring that the communication is encrypted and protected.
HTTPS is one of the main protocols used for delivering websites securely over the internet.
Table of Contents
How HTTPS works
HTTPS is HTTP combined with encryption provided by TLS (Transport Layer Security).
When a user connects to a website using HTTPS:
- the browser initiates a connection to the server
- the server presents a digital certificate
- the browser verifies the certificate
- a secure encrypted connection is established
- data is exchanged through this encrypted channel
This process ensures that communication between the user and the server cannot be easily intercepted or modified.
HTTPS and encryption (TLS)
HTTPS relies on TLS encryption to secure data transmission. TLS ensures:
- confidentiality of data (it cannot be read by third parties)
- integrity of data (it cannot be modified unnoticed)
- authentication of the server (the website is verified using a certificate)
The encryption process is established during what is known as a TLS handshake.
HTTP vs HTTPS
HTTP ≠ HTTPS
| Feature | HTTP | HTTPS |
|---|---|---|
| Encryption | No | Yes (TLS) |
| Data security | None | Encrypted |
| Default port | 80 | 443 |
| Browser indication | Not secure | Secure connection |
HTTPS is the secure alternative to HTTP and is recommended for all websites, especially those that handle login data or personal information.
SSL and HTTPS
SSL is the older name for the encryption technology used in HTTPS. In modern systems, SSL has been replaced by TLS, but the term SSL is still commonly used in practice.
In technical terms:
- SSL/TLS provides encryption
- HTTPS uses HTTP over SSL/TLS
Practical use cases
HTTPS is used for:
- secure website browsing
- login pages and authentication systems
- online payments and forms
- API communication between services
- protecting user data during transmission
Practical implications
Without HTTPS, data transmitted between the browser and server is not encrypted and may be exposed to interception.
Modern browsers may mark HTTP-only websites as insecure, especially when sensitive data is involved.
In hosting environments such as mybox, HTTPS is typically enabled using SSL/TLS certificates for each domain.
Summary
HTTPS is a secure version of HTTP that uses TLS encryption to protect data between a browser and a server. It ensures confidentiality, integrity, and authentication for all web communication.