A virtual private network (VPN) may confuse some people. At it's core, a VPN is a private network that is made available to authorized users from the internet. Examples of a private network would be the network at your work, at college, or government locations.
Those networks have internet access, but the internet does not have access to them, hence the term private network. The private network becomes virtual when you are able to access it from the internet. The internet still does not have access to the private network, but your computer does. As far as the private network is concerned, your computer connection is at work or school.
When you connect to a VPN, you are connecting to a set of servers over the internet. This process is known as tunneling. Anything you do on the internet will go through these servers. All of this data is encrypted, which provides great privacy for you.
As far as your internet service provider knows, you're connecting to some IP address. They cannot see what the data is or anything.
The most important, and obvious, reason is security. As we stated above, all of your internet data is encrypted once you have created that tunnel. Hackers, for example, would not be able to intercept your internet browsing activity. Hackers will often attempt to do this when you use public WiFi in places like coffee shops and airports. If you make a purchase with your credit card on public WiFi, hackers could get a hold of your credit card number. This is why you should use a VPN.
A secondary benefit, which ties into security, is privacy. Because all traffic is encrypted, all data secure and private. What you search for, watch, read, or listen to is your own business. You ISP and hackers will not know what you are doing online.
VPNs will not, however, protect you from tracking by various website trackers, such as cookies.
VPN provides encryption to network traffic. It ensures the communication cannot be easily eavesdropped/tampered with by adversaries. It does not impact application features like cookies. So yes cookies can still be set on your browser if you are tunneled through VPN.Ximning Ou from the University of Southern Florida
In order to prevent these tracking efforts, you can surf the web with your browser's incognito/private mode. Another option would be to install an extension that prevents this, like ghostery.
Another reason for using a VPN? Virtual locations. Many providers will have servers in multiple locations. This was an option many Netflix users chose to access content that was not available in their region. Just because content has a block in your country, does not mean it is in another country. All you need to do is tunnel into a VPN server in a country that does not have the block, and you will have access.
The same works in reverse too. For example, you're traveling out of the country but your bank blocks access to users outside of your homeland. You can use your VPN to tunnel to a server located back home to gain access.
On a side note, just because using VPN allows your to potentially bypass restrictions, do not forget you are still operating under your countries laws. VPNs will make you anonymous online, not invisible. If you start doing anything illegal or suspicious. Given enough time and resources, government agencies could, in theory, still find you.
Today, there are tons of VPN providers to choose from. Some providers are great, some are not. Below are some things to consider when choosing a VPN provider:
One of the biggest drawbacks is internet speed. Depending on the provider, you will see reduced internet speeds. Sometimes, the reduction is small, other times its large. It all depends on the number of users connected to the same server as you, the location of the server, and the providers setup. Longer distances between you and your VPN server means longer distances for data to travel in order to reach to the internet.
A secondary, and minor, issue is that when you use a VPN as a virtual location, you can see some issues while shopping. Say you live in the US, but have a connection through a tunnel in the UK. While shopping online, your pricing may show in pounds instead of US dollars. The simple solution is to use a server in your country while shopping online.
Using a VPN is becoming more of a necessity each day. The krack attack has proven that access to home WiFi traffic can occur. Connecting to a VPN service protects you from this vulnerability. Ensuring you have a good VPN provider will help ensure you are better protected.
As many smartphone users are becoming aware, their phone number and location is not private when they use their phone to surf the internet. All of their data is mined and can be sold thanks to their mobile advertising id (MAID). It only costs $1,000 to track someone online, according to Wired’s Andy Greenberg. In a nutshell, when you visit a website via your smartphone, both the website and the advertisers on the site have access to your phone's IP address and advertising ID. Your telecom assigns your phone an IP address, since they needs to bill you for data use. Because of this, that IP address is also tired to your billing information. And now your telecom sells your information to third party companies. Those companies allow websites and applications to take your phone's IP address and lookup all of your information on those third party resources. So, a website or application can figure out your phone number, home address, email, and phone location.
Some people may remember that Verizon was stopped by the FCC from using super cookie's. Super Cookie's allowed websites similar tracking features the mobile advertising id. Even though the FCC stopped what Verizon was doing, most telecoms figured out that they already were tracking their users with the IP addresses the assign. And since telecoms have the ability to sell your billing information to advertisers, there is no need for a super cookie. Just dump customer data to a data base, and let advertisers run a search on that data for all the data that matches your IP address. And this is not just something that Americans have to worry about, all customers globally have to worry about this.
Many people are finally starting to understand the sacrifices we make and privacy we give up when we use smartphones. The FCC is supposed to have our back, but we know that's not really the case anymore. But, like I said, many people are starting to connect the dots on their own, about why we get more spam phone calls. One Redditor commented:
“Sprint does it too. Source: I started getting random phone calls from random ass places once I got with sprint.”
Another Redditor had the same issue on another telecom’s service:
“I was with T-Mobile for years and would get 1-2 calls a month from scammers. I switched to Verizon and got them daily. Sometimes multiple times a day. I called Verizon only to have them try and sell me a call blocker service for $4.99/Mo. I downloaded a free can blocker app and have blocked 100+ numbers in 8 months…”
Like I have said before, the easy solution is to change your IP address and browse the web securely to protect your privacy. VPN's allow you to do that. But, it comes at the cost of slower speeds. Until there is legislation that fixes all of these privacy issues, like making everything opt-in, and fines perpetrators, your data and privacy are always at risk. An no, using WIFI is not a good alternative anymore, especially since there is the WPA2 KRACK.