What is VPN Encryption and How VPN Encryption Works?

Published Date : Apr 18, 2023
Category : How To
What is VPN Encryption and How VPN Encryption Works

If you are curious about what a VPN is and how its encryption works then this is the guide for you. Let’s start without any ado.

To begin with, a VPN is a Virtual Private Network that enables you, the user or client, to guarantee that your network activity is only known to just you and the ISP. This function works in the same way as a home private network. The information and files transferred over a VPN Encryption are protected and kept apart from the rest of the Internet and the users of the Internet, similar to other private network setups.

A Virtual Private Network is handled remotely, as the name indicates, but a home network handles the same procedure via a local router that ensures that your information is private and secured. Although there are endless VPN encryption services available online, the paid ones get an edge over the free VPN for Windows 10, 11, or older version devices.

How Do VPNs Work?

We know that a VPN can encrypt your information in the same manner as a home router does. The sole distinction is that a local network shared through a common router does not need Internet access to operate. A VPN encryption is performed solely via the Internet, however, there are inherent hazards that must be overcome with extra security methods.

To start utilizing a VPN, both the consumer and the service provider must install VPN-enabled software on their respective computers. The provider often works via a Remote Access Server, which supports a variety of protocols and a tunneling mechanism to validate sent data.

VPN Encryption In A Nutshell

A VPN Tunnel is a secure connection established between the user, the client, and the host or server. This tunneling procedure guarantees that your information is encased or masked, making it impossible for anybody to intercept, change, or even monitor your activities. Tunneling conceals and transports your data from the rest of the Internet.

Tunneling also assures that your location is known only to you and the server to which you are connected. This is accomplished by sending out the IP address of the host server through which the VPN Encryption is operating rather than your own, providing perfect anonymity.

Also Read: Difference Between VPN and Proxy Server | Proxy vs VPN

Procedures for Encryption

  • Point-to-Point Tunneling Protocol (PPTP): PPTP is one of the most established protocols. Because of its simplicity, this protocol can be set up rapidly. Nevertheless, since it is based on the MS-CHAP-v1/v2 authentication protocol, its implementation has been found flawed in security analysis testing and may not be advised if security is of fundamental significance.
  • Layer 2 Tunnel Protocol (L2TP): L2TP was introduced as an upgrade to PPTP. L2TP employs an improved version of the Layer 2 Forwarding Protocol while also employing the IPSec capability to encrypt and authenticate individual IP packets. Another problem that might arise is communication being prevented by certain firewalls that do not permit activity on the User Datagram Protocol 500 Port.
  • Secure Socket Tunneling Protocol (SSTP): While only available on Windows PCs, SSTP is regarded as one of the most secure protocols available. Although it is more accessible to the ordinary Windows user than L2TP, it misses some of the benefits provided by OpenVPN’s open-source software.
  • Internet Key Exchange: Depending on the version, IKEv2 may simply be referred to as IKE for Internet key exchange. IKEv2 is one of the most recent protocols, therefore it may be used on some of the most recent systems, such as Android, iOS, Windows, and MAC.
  • OpenVPN: OpenVPN is an open-source software program that uses point-to-point or site-to-site connections with key exchange using both SSL and TLS. This protocol is one of the most secure and failsafe protocols available. Unlike L2TP, OpenVPN may operate over UDP or TCP ports, enabling it to circumvent any firewall. OpenVPN, like any other open-source software, is extremely flexible and constantly evolving.

VPN Encryption Protocols: Pros & Cons

So, now that we’ve covered some of the most prevalent security protocols for VPN encryption, here are some benefits and downsides to consider when deciding which one to use:


PPTP Advantages: Simple to set up, easily accessible, and capable of fast computation.

Disadvantages:  It is not secure.


L2TP Advantages: It is simple to set up, widely accessible, and has been shown to be more secure than PPTP.


  • Certain firewalls prevent access.
  • Because of the open-source nature of the program, OpenVPN has shown to be the most secure, capable of bypassing firewalls, and extremely flexible.
  • Difficult setup procedure owing to third-party software necessary.


SSTP Advantages: Can circumvent firewalls and has been demonstrated to be extremely safe.

Disadvantages:  Only Windows is supported.


IKEv2 Advantages: Superior security, enhanced stability, and speed.


  • Not open source, not accessible on all systems, restricted configuration options, and the untrustworthy nature of non-open source implementations.
  • This tunneling procedure is a good start toward ensuring that you and your data are safe on the Internet, but it is not the only thing that a VPN does to achieve total protection. VPN encryption provides the next level of protection.

Also Read: How to Boost Slow VPN Speed

Data Transmission Through VPN:

Packets are information bits that are transmitted during the tunneling process. While the VPN Encryption tunnel may safeguard your data better than without it, the VPN does not end there.

The information passed across the VPN connection is encrypted to provide even more security. VPN encryption adds another layer of security by encrypting data packets in a manner that only you, the client, and the server to which you are connected can read.

While there are a variety of security protocols that may be used to encrypt your data, the most used are the Internet Security Protocols and OpenVPN. These protocols function in two ways.

  • Initially, the data packet is encrypted using a VPN encryption key known only to the VPN client and the server.
  • Another one is by using a sub-protocol known as Encapsulation Header, which excludes some information from the transmission, such as the user’s IP address.

Closing Lines:

Data is gold and hence it is necessary to save your data. By connecting to a Virtual Private Network, the average user may avoid having their online activity recorded and identities getting disclosed. The user must assess the many VPN services available to choose which one is best for them.

Hopefully, you are now aware of what a VPN is. If you have any more questions feel free to connect with us. Make sure you subscribe to our blog for more tech tutorials and guides. Follow us on Facebook, Pinterest, Twitter, and Instagram to stay updated.

Akshara Parnami
Akshara is an Engineer turned Technical Writer. She is a tech reader who aims to deliver the best of her knowledge to the readers without complicating it. If not writing you can find her in the kitchen, because no place serves the good tea.

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