SECURITY IN INTERNET ?
HTTP-Hypertext Transfer Protocol
These are the set of rules used for data communication over world wide web.Whenever you open a website on the internet with HTTP the data sends and receives between browser and server is only possible through the HTTP.But the problem arises that the connection between the user browser and the server is open and link up is in plain text.It means the hackers can attack your website easily and they can trace what work are you doing on the website.But the main problem arises when the sensitive information like bank details and important password are entered in the HTTP website.The packets can be traced easily by hackers.
HTTPS-Hypertext transfer protocol secure
In this, the connection between a web browser and a web server is in the encrypted format and a third party can not detect work you were doing on the website as the data is in encrypted form instead of plain text.All popular website use HTTPS.
HOW TO GET HTTPS IN YOUR WEBSITE
You need to apply for SSL(Secure sockets layer) certificate.And when you get this certificate by paying a certain amount then you need to install that certificate to your web server.