VPN stands for Virtual Private Network,A VPN creates a private tunnel over the open internet. The idea is that everything you send is encapsulated in this private communications channel and encrypted so — even if your packets are intercepted — they can’t be deciphered. VPNs are very powerful and important tools to protect yourself and your data, Each internet request usually results in a whole series of communication events between multiple points. The way a VPN works is by encrypting those packets at the originating point, often hiding not only the data but also the information about your originating IP address. The VPN software on your end then sends those packets to the VPN server at some destination point, decrypting that information.
The VPN service gives you an app that you run on your local device, which encrypts your data, and it travels in its encrypted form through a tunnel to the VPN service provider’s infrastructure. At that point, the data is decrypted and sent on its way.
Two things happen here: First, if you’re using an https connection, your data is encrypted by your browser and then by your VPN app. At the VPN data center, your data is decrypted only once, leaving the original encryption provided by the browser intact. That encrypted data then goes on to the destination application, like your bank.
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