Diffrence Between http and https

http:
HTTP is Hyper Text Transform Protocol and is transmitted over the wire via PORT 80(TCP). You use HTTP when you are browsing the web.
https:
HTTPS (Hypertext Transfer Protocol over Secure Socket Layer, or HTTP over SSL) is a Web protocol developed by Netscape and built into its browser that encrypts and decrypts user page requests as well as the pages that are returned by the Web server.
We Can also Say That HTTPS = http + ssl (Secure Socket Layer)

Difference between HTTP and HTTPS:

1. URL begins with “http://" in case of HTTP while the URL begins with “https://” in case of HTTPS.
2. HTTP is unsecured while HTTPS is secured.
3. HTTP uses port 80 for communication while HTTPS uses port 443 for communication.
4. HTTP operates at Application Layer while HTTPS operates at Transport Layer.
5. No encryption is there in HTTP while HTTPS uses encryption.

6. No certificates required in HTTP while certificates required in HTTPS.

HTTP includes the following actions:

1. The browser opens a TCP connection.
2. The browser sends a HTTP request to the server
3. The server sends a HTTP response to the browser. 4. The TCP connection is closed.

SSL will include the following actions:

1. Authenticate the server to the client.
2. Allow the client and server to select the cryptographic algorithms, or ciphers, that they both support.
3. Optionally authenticate the client to the server.
4. Use public-key encryption techniques to generate shared secrets.
5. Establish an encrypted SSL connection.
6. Once the SSL connection is established the usual transfer of HTTP requests will continue.

HTTPS includes Both HTTP and SSL (secure Socket Layer) Actions.

Https Should Be Used In Banking Websites, Payment Gateway , Shopping Websites etc.

Example of HTTPS : https://www.paypal.com/