Introduction: In now days sending data over the internet is unsecured. As a web developer you have to ensure that your web application is safe and secure and there are no chances of hacking when data is on the way to server. Scenario: Imagine if your website has a login page and your end user enter his user id and password in provided text box's. after that he press the submit button. now these user id and password sent to the server using internet. before sent data reached to server, this data is passed from many routers and servers. there are chances that any person sitting on servers can track user id and password (this data will be in clear text format). Solution: To avoid data stealing over the network there are two options. Use HTTP instead of HTTP. for this option you have to purchase SSL for your website and this is paid option. Other option is embed a small encryption and decryption code to secure user important data which will travel over the internet
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