What Is VPN Encryption, Types, Protocols, And Algorithms Explained

Virtual Private Networks (VPNs), first available on the market twenty years ago, are a remarkably durable cornerstone of contemporary security. Millions rely on these products to protect their internet privacy, secure public Wi-Fi connections, and get around site bans. Most large organizations still use VPN solutions to enable secure remote access.

Most know that a VPN changes our IP address and sends our internet activity through an encrypted tunnel. However, not all VPNs are made equal. A VPN may have varying speeds, capabilities, or vulnerabilities depending on the protocol. At the core of VPN technology are encryption protocols and ciphers, which determine how your secure tunnel’ is created. Each stands for a unique response to the issue of safe, private, and largely anonymous browsing.

Even though most of us know how a VPN usually operates, it’s possible to lose track of the specifics of the technology due to the topic’s extreme intricacy. Many VPN services can be hasty to the point of being deceptive when defining their encryption, which adds to the uncertainty.

Therefore, those who want to understand more about the technologies underlying their VPN Encryption services can use this article as a simple resource. We’ll go through several VPN encryption methods, the most used VPN protocols, and the fundamental algorithms that underlie them all.

Let’s begin!

“VPN Encryption” What’s that Term?

A virtual private network (VPN Encryption) is a safe network that enables encrypted tunneling of data and conversations to and from your device to the Internet. It encrypts connections to public Wi-Fi networks, protects your online activity while using the Internet, and allows you to access banned websites. It has various levels of security, speed, dependability, and capabilities. So, keep reading this insightful article for more information on selecting a VPN.

Various Varieties of VPN Encryption:

The purpose of a VPN is to establish a secure connection between two points, but it does not specify what those points should be. It enables the usage of VPNs in several situations, including:

‌Site-to-Site VPN: A secure connection between two geographically separated locations is made possible by a site-to-site VPN. Nowadays, the majority of security gates come with VPN connectivity. A next-generation firewall (NGFW), implemented at the network’s perimeter, safeguards the business network and acts as a VPN gateway. This entry point, which protects the traffic supplied to the gateway at the other site, handles all traffic between the sites. The data is decrypted and sent to its destination through this gateway.

‌Remote Access VPN: A secure connection between remote users and a business network is made possible by a remote access VPN. For instance, many organizations switched to a remote workforce in the wake of the COVID-19 pandemic in 2020, and they set up safe remote-access VPNs to allow distant consumers to connect to crucial business processes at their corporate sites.

‌VPN as a Service: A cloud-based VPN service VPN is a virtual private network that is housed on a cloud-based infrastructure. Instead of using the client’s local address to access the Internet, packets from the client are sent through the cloud infrastructure. Consumer VPNs frequently use this concept, allowing customers to safeguard their online privacy and security when using unreliable public Wi-Fi to connect to the Internet.

Symmetric and Asymmetric Type: Asymmetric encryption employs public and private keys, whereas symmetric encryption uses a single key shared by two parties. Data access and decryption are both restricted to those with both keys.

Best Protocols of VPN Encryption Techniques:

VPN protocol types can be separated into two groups. One protocol is utilized in Category One for data protection and tunneling down the tunnel. A distinct strategy is used by Category Two, which combines two protocols for both data protection and transportation.

1) PPTP:

One of the first VPN protocols was PPTP (Point-to-Point Tunnelling Protocol). Microsoft and 3Com created it first in the 1990s for dial-up networks. However, PPTP is currently virtually ever utilized because the protocol has numerous security flaws that have been discovered. A well-known security researcher named Bruce Schneier presented a study in 1998 that exposed various security holes.

2) WireGuard:

WireGuard is free software created under an open-source license, much like OpenVPN. It is still going through a quick development cycle, though. Every day, new versions are released. The extremely compact codebase of WireGuard is one of the main advantages. Compared to OpenVPN, for example, this makes it considerably simpler to detect security-related flaws. WireGuard allows for a handover across different networks, just like IKEv2. It makes the protocol appealing for deployment when used with mobile endpoints, as does its high level of energy economy.

3)L2TP/IPSec Layer 2 Tunnel Protocol:

L2TP is typically used in conjunction with IPSec because it cannot provide encryption or authentication on its own. In this configuration, L2TP is regarded as being very secure. Data can be exchanged securely via public networks, for example, using the IPSec suite of protocols, consisting of multiple individual protocols rather than one. L2TP lacks the level of security and identification that IPSec offers.

4) OpenVPN:

Free software called OpenVPN can create VPN connections. It commonly connects to TLS or OpenSSL to encrypt the transferred data. Despite having several tested security features, OpenVPN is only utilized by a small percentage of businesses. However, the protocol is rather common in the private sphere.


Secure Socket Tunnelling Protocol, sometimes known as SSTP, is a protocol that was created by Microsoft and made its debut with Windows Vista. However, its close integration with the Windows environment is both a blessing and a problem. While it works nearly solely with Windows PCs and servers, on the one hand, its integration into Windows makes it reasonably simple to use.

VPN Encryption Algorithms:

Some of the best Encryption Algorithms seen are as follows:

Triple DES or 3DES –

Computerized cryptography, or Triple Data Encryption Standard, applies three block cipher methods to each block. The triple DES’s crucial size is increased to provide more protection using encryption methods. Each block contains 64 bits of data. There are three separate 56-bit DES keys for 168 bits. It offers excellent security and efficiency because of its complicated structure and lengthy encryption.

‌RSA –

Rivest-Shamir-Adleman is referred to as RSA. Modern computers use this algorithm for encrypting and decrypting data. An asymmetric cryptography algorithm is used. The asymmetrical nature demonstrates the existence of two distinct keys. Since one of the keys can be given to anyone, it is often called public-key cryptography. The other key is the private key, whereas this is the public one. Both are equally effective in encrypting and decrypting data. The difficulty of factoring long strings and the requirement that the solution be obtained by multiplying two large prime numbers provide the high level of security that RSA provides.


Blowfish is regarded as an effective substitute for DES because of how similar the two are. It was developed as a general-purpose algorithm by Bruce Schneier. The reliability and security of cipher have been tested numerous times, yet they have consistently come out on top in these encryption tests. Because Blowfish uses symmetric encryption, a single key can secure an entire data block.


The same person who created Blowfish, Bruce Schneier, is also the creator of Twofish. This symmetric algorithm makes use of block ciphering. The same key is used for encoding and decoding as it’s symmetric. The data is divided into 128-bit blocks for the Twofish algorithm’s operation, and each 128-bit block is simultaneously applied with the key. For 256-bit data encryption, it simply employs keys. The encryption of each block is linked in a very complicated way to the outcome of the encryption of the block before it. The data appears random as a result, but everything has a purpose. This encryption technique is free because a patent does not protect it.


AES was developed by Vincent Rijmen and Joan Daemen, two Belgian cryptographers. It was originally known as Rijndael and then went by the name AES, which stands for Advanced Encryption Standard. An asymmetric encryption algorithm is called AES. It became well-known due to its simple hardware implementation and constrained environments. Given that it uses intricate algorithms and lengthier keys, it is thought to be more effective than its forerunners. With this approach, decryption proceeds considerably more quickly. Because of this feature, it performs better as a cipher substitute in routers, firewalls, security protocols, and, generally, any encryption application.


Because so many businesses need secure remote access solutions, finding VPN Encryption Algorithms work for you is becoming a top priority. Contact some top agencies to learn more about setting up secure remote access on your network. And don’t hesitate to ask for a free trial of such solutions for securing your remote workforce to find out how they can enhance the security and productivity of teleworkers within your company.

Leave a Comment