The encryption and decryption processes depend on both the sender and the receiver having knowledge of a common encryption key. Intercepted packets sent along the VPN connection in the transit network are unintelligible to any computer that does not have the common encryption key. The length of the encryption key is an important security parameter. Computational techniques can be used to determine the encryption key. Such techniques require more computing power and computational time as the encryption key gets larger. Therefore, it is important to use the largest possible key size.
And they manage to do all of this without sacrificing performance, offering one of the fastest download speeds (83 Mbps out of 100 Mbps) and the best 24/7 customer support in the industry. The only downside? It’s a little on the pricey side, with monthly plans starting between $6.67 and $12.95/mo. But it’s a small price to pay for excellent performance in almost every category.

VPNArea is one of the few providers that offers dedicated IP addresses in various countries around the world, as listed on their website. It also allows account sharing (six simultaneous connections permitted). VPNArea continues to improve and remains an excellent choice for privacy-focused users. Check out their discount pricing for annual plans. [Learn more >]
It’s up to you to answer these questions by reading over the documentation provided by the VPN service provider before signing up for the service. Better yet, read over their documentation and then search for complaints about the service to ensure that even though they claim they don’t do X, Y, or Z, that users aren’t reporting that they are in fact doing just that.
But for a company that bills itself as "the world's fastest VPN," Hide.me was kind of mediocre, with our download speeds dropping to a third of the non-VPN baseline. Free users are limited to 2GB of monthly data and can connect to servers in only three countries; either of those limitations would be more acceptable if the network speeds were faster.

Servers – Boasting over 2,000 servers, PureVPN’s network is like a giant tentacle monster with multiple servers located in over 140 countries of the world! Geographically, PureVPN covers more locations around the world than any other VPN I have come across. You can choose to automatically connect to the best VPN server depending on the purpose you wish to use the VPN for or choose your own preferred server manually. It takes a relatively long time to connect to the server compared to other VPN providers, which is one of the downsides of this VPN. But as soon as you are connected, you will experience that joy of having unprecedented freedom on the web.
Betternet is a straightforward app that connects to a VPN with a single click allowing for access when needed. No registration is required and unlike some other free VPN services there are no data caps. All of this is provided by occasional ads and a promoted premium version which are manageable and discreet. The traditional problem with free VPN access has been slow connection speed and while this is still apparent it is not too much of an issue.
TorGuard also lacks extra features that are nice to have, like automatically connecting to the VPN when you’re on an unknown Wi-Fi network (which IVPN offers) or split-tunneling to choose which apps do and don’t route through the VPN (which ExpressVPN supports). And it offers no option to automatically connect to the fastest server, a feature our top pick lacks as well. But if you have above-average knowledge of networking, you’ll appreciate TorGuard’s more in-depth settings pane, which allows you to add scripts or kill specific processes when the VPN disconnects—neither our top pick nor popular services like Private Internet Access allow that kind of control.

Ivacy is a Singapore-based VPN service. It is on the lower end of the spectrum in terms of the speeds it offers. Nonetheless, it has strong security mechanisms such as DNS leak protection and AES 256 bit encryption. Its servers are located in more than 100 countries in the world. Find a comprehensive review about Ivacy VPN for pros and cons of the service.
Mullvad is not that easy to use, with a bare-bones desktop interface and, unlike every other VPN service we've reviewed, no mobile client apps. (You do get instructions on how to manually set up OpenVPN apps.) This service's network speeds were far from great in our tests, and it's fairly expensive, with no discount for paying yearly instead of monthly.
You might be thinking: “I only need one connection, don’t I?” What if you want to set up VPN access on more than one device, for more than one family member, on your home router, or the like? You’ll need multiple concurrent connections to the service. Or, perhaps, if you’re particularly security oriented, you’d like to configure multiple devices to use multiple different exit nodes so your collective personal or household traffic isn’t all bundled together.
Final Verdict – NordVPN is easily one of the best all-around providers. I would especially recommend this VPN for users that value their privacy. The encryption protocols, jurisdiction, and logging policies of NordVPN make it the perfect VPN for users concerned about their privacy. And its Double VPN feature makes it stand out from the crowd, something I have covered in detail in NordVPN review.
But even if you know who’s behind your VPN, you shouldn’t trust a free one. A free service makes you and your data the product, so you should assume that any information it gathers on you—whether that’s an actual browsing history or demographics like age or political affiliation—is being sold to or shared with someone. For example, Facebook’s Onavo provides an encrypted connection to Onavo’s servers like any VPN, shielding you from the prying eyes of your ISP or fellow network users. But instead of promising not to examine, log, or share any of your traffic, Onavo’s privacy policy promises the opposite. Covering the service, Gizmodo sums it up well: “Facebook is not a privacy company; it’s Big Brother on PCP.” Facebook collects information about your device, other applications you use, and even “information and other data from your device, such as webpage addresses and data fields.” And the company “may combine the information, including personally identifying information, that you provide through your use of the Services with information about you we receive from our Affiliates or third parties for business, analytic, advertising, and other purposes.” That means Facebook can collect anything it wants, and sell it to anyone it wants.
VPNs also cloak your computer's actual IP address, hiding it behind the IP address of the VPN server you're connected to. IP addresses are distributed based on location, so you can estimate someone's location simply by looking at their IP address. And while IP addresses may change, it's possible to track someone across the internet by watching where the same IP address appears. Using a VPN makes it harder for advertisers (or spies, or hackers) to track you online.
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