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How Does a VPN Protocol Work?

We could get into a lot of detail about the workings and history of VPN protocols (in fact, we did), but there are three things you really need to know about how a VPN can encrypt your data.

  1. A VPN Encryption Protocol tells computers how they should interact with data and a server in order to use the VPN.
  2. Different VPN protocols handle data differently, and allow you to balance transfer speed with security via encryption to meet your needs.
  3. PrivadoVPN only uses the best, time-tested VPN encryption protocols to make sure that your security isn't compromised by buggy, new software.

Customize Your Encryption

Not every VPN Encryption Protocol is for every user, which is why PrivadoVPN lets you choose which VPN protocol to use from the most proven options in existence. We also have our technical team constantly looking for new cipher and algorithm options that show the same high level of encryption security and functionality as what is currently available on our service.

What this means is that you have the ability to change your VPN settings to match your Internet usage style. Do a lot of media and game streaming? You might want a protocol that is safe, but prioritizes speed. Downloading large files? Pick a VPN protocol that is more secure so that you not only protect your network from spying, but also ensure that the files come through uncorrupted.

Everybody uses the Internet differently. Shouldn't your VPN recognize that?

Why The Encryption that Comes 
from a VPN Is Good Security Hygiene

All of Your VPN Data is Encrypted

Before it even leaves your computer, the data you are sharing will be encrypted by your VPN apps so that only you and the recipient will know what it is based on a series of public and private "keys." Then, your information will be sent through a secure, encrypted tunnel to prevent data leaks or snooping. We use the strongest encryption algorithm options, a 256-bit AES cipher, and VPN tunneling protocols designed to keep even the most dedicated miscreant from reading your file in transit.
On top of the great encryption that comes from an AES cipher and a secure algorithm, using a VPN can also help make you anonymous on the Internet. This works via a process called "IP masking," which hides the most readily accessible information about you. With a VPN, your data is routed through one of our secure global servers, changing your IP so you can use the Internet without letting anyone know your identity online.
You might not even realize, but a lot of ISPs actually will put artificial caps on the speed of your Internet server access. If your ISP is doing that to you, using a VPN can bypass that trick. When you're connected to a virtual private network, your ISP can't tell what sort of protocol you're using to transfer files, so you may even see a dramatic increase in download speed using PrivadoVPN. And without your private key, they never will.

What's the Difference Between Various Encryption Protocols?

There are several encryption protocols that a VPN can use to protect your network. The fact of the matter is there's no straightforward security method to mix data up and put it back together. Each encryption protocol on a VPN uses a specific algorithm to find the right balance between server speed and Internet security.


This is the strongest encryption protocol regarding security of any in existence. It is also the slowest because it checks every byte that is transmitted to make sure it's correct. However, it is still popular among VPNs because of the security benefits.


This VPN protocol is built for speed. Instead of checking the network transfer while it's going on, it sends a list with the public key that can be verified when the server has the full file. It has slightly less robust security than OpenVPN, but is still a great 
VPN protocol.

Frequently Asked Questions

There are two critical ways that a VPN guards your private information and improves your online security.

  1. First, connecting to VPN servers masks your IP address for better privacy. That means that the personal information normally indicated by that number is hidden behind those VPN servers.
  2. Secondly, a VPN encrypts your data. PrivadoVPN uses 256-bit-AES encryption, which means that your data is systematically scrambled before it leaves your computer. That information then travels through an encrypted tunnel, through the VPN, to the destination computer. Only when the transfer is complete will a "private key" be used to unscramble the files into usable information.

The world's fastest computer would take 27,337,893,038,​406,611,194,​430,009,974,​922,940,323,​611,067,429,​756,962,487 years to break 256-bit encryption by brute force. Put another way: 27,337,893 trillion trillion trillion trillion years. This is the best form of encryption on the planet and the gold-standard for online security.

Without high quality encryption, your connection just isn't secure. Good Internet security requires a VPN that can both hide and guard your data.

First of all, without a VPN, anybody can watch what you do online. In fact, somebody stalking a server probably has several times and you had no idea. Encryption makes that activity impenetrable.

Secondly, a VPN often has better encryption options than other protective measures. A VPN server is made with security in mind, so it will be able to employ better encryption than your personal system.

Your Internet connection is less like a tube and more like a road (or "superhighway" as people used to say in the 90s). Your information essentially travels out in the "open," like a car. And like a car, people who are watching the road can see inside and get access to that data, putting your security at risk.

A VPN is like building a secure tunnel around your data car. Before the data goes anywhere, it creates a wall of encryption using a combination of a public and private key that maintains your privacy by keeping anyone watching from being able to see it.

Moreover, a VPN hides your identity while you're online by hiding your real IP, which is the unique number every Internet-connected device is assigned to facilitate data transfer. In reality, the only true connection your computer makes is to the VPN server. After that, your VPN requests all the data you want and then passes it back to your computer, so requests come from the VPN and your privacy remains secure.

Advanced Encryption Standard (AES) is a block cipher used for encryption. It's so strong that the US government uses AES to encrypt classified documents as they travel from server to server.

But AES is for more than just transfers on a government network. In fact, using it for VPN security has helped us provide unbreakable encryption options. Using AES makes your computer and connection more secure.

It works by generating a public key and a private key based on the level of encryption your VPN is using. A "key" is a string of anywhere from 128 to 256 characters that acts as the code for how to rearrange your data.

When your VPN makes a connection to another server, it will send over its public key and receive a public key. Those keys will be used to make what's called a "session key," which is unique to every server-to-server connection and is an agreed upon way that the encryption will work.

At that point, the AES generated private key is used to decrypt all of that information into useful files.

AES encryption on PrivadoVPN is as secure as it can possibly get because our VPN protocols put the plaintext data through 14 rounds of scrambling. Only with the private key can anyone read any of the files that our VPN converts into ciphertext with AES encryption.

I don't think you'll be surprised to learn that we think the best VPN that is both free and keeps zero logs is PrivadoVPN. Here's why:

  1. You get 10 GB of data for free every month. That's up to 5 times more than almost every VPN on the market. Your privacy is safer, longer.
  2. Users can access 12 VPN servers from around the world, so it's possible to set your location for the fastest possible speed and best security/privacy.
  3. You'll be able to stream high quality content and use P2P services with a free VPN account.
  4. Because we are committed to our users' privacy, PrivadoVPN doesn't ask for anything other than a verified email to sign up for VPN service.

PrivadoVPN Offers All of These Amazing Features

Access on Multiple Devices

Never get locked out of regional content again. Use the free PrivadoVPN app on up to 10 devices at the same time with a premium membership and know that your connection is secure whether you're chatting on your phone, streaming video on your TV, or browsing the 'net on your laptop. Build an encrypted tunnel right through to that show, movie, or video.

Premium Network

PrivadoVPN has a premium network and we own a lot of our own equipment. We use the latest protocols, industry leading architecture, and a dedicated development team to make sure your private information stays private while not slowing you down. You don't sacrifice performance for privacy with PrivadoVPN.

Kill Switch

In case of an emergency, PrivadoVPN has you covered! Our kill switch feature will disable all your online activity in the event that you unexpectedly lose connection to the PrivadoVPN client. You will never send unsecured data, even by accident.

SOCKS5 Proxy

Set up the PrivadoVPN SOCKS5 proxy on your favorite P2P client to get the fastest possible downloads with a secure IP address. Keep your peer-to-peer transfers safe and anonymous without sacrificing speed, no matter who's looking.

24/7 Customer Support

Get best-in-class customer support from the dedicated PrivadoVPN support team. We are here for you at any hour, every day of the year through either chat or email.

Zero-Log Policy

We are a no-log VPN based in Switzerland, which means that we don't track any of your online activity and your account is protected by the world's best privacy laws.

Secure Encryption Protocols

Use the VPN protocol that best fits your needs. Choose between leading VPN protocols like OpenVPN, IKEv2, and WireGuard® to find the perfect balance of speed and security for how you use the Internet.

Servers Around the World

Get access to cities in countries, so you can be virtually anywhere, including Amsterdam, Chicago, Hong Kong, or London. Bypass government censorship and unlock content wherever you happen to be.

Protect Up to 10 Devices With One Account

Now you can protect up to 10 Internet connected devices with a single PrivadoVPN Premium account. You no longer need to worry about whether to activate your VPN on your Mac laptop or your smartphone, you can protect them both, as well as the phones, tablets, and streaming media devices of the rest of your family.

That means everybody can enjoy the security of a VPN with a hidden IP address and 256-bit encryption wherever they are.


Protect your desktops and laptops from spying and anonymize your online activity at home or out and about with the PrivadoVPN app.

Mobile Devices

On a phone or a tablet, you can make sure that everything you send and receive on it is encrypted, sent through a secure tunnel, and routed through our extensive server network.

Streaming Services

Whether you're watching on an Internet-ready TV or using an add-on device, you can protect your stream with PrivadoVPN.


You don't have to choose what devices to protect while you're at home. Install PrivadoVPN on your router and protect everything connected to your network.

Pick a Plan to Protect All Devices

Hundreds of Servers in Countries Around the Globe

Whether you're traveling the world and want to access the show from home that you started or simply want to hide from prying eyes, you'll be able to find the fastest VPN server to meet your needs.

Czech Republic
Hong Kong, SAR China
Korea (South)
New Zealand
South Africa
Taiwan, Republic of China
United Kingdom
United States of America