In our digital-first world, online privacy is constantly under threat. As a result, VPNs have become an essential tool for protecting your personal and business data. But you know what a VPN does; have you ever wondered how it protects your data?
The answer lies in VPN protocols. They secure your internet traffic. VPN protocols come in different kinds. It started in 1990 when Microsoft developed PPTP. Today, advanced systems keep data secure. In this blog, we’ll explore the types of VPN encryption systems.
What are VPN Protocols?
VPN protocols scramble your internet traffic and provide a tunnel to access servers worldwide. This protects your data from internet service providers (ISPs) and third parties. There are different encryption protocols available, which make this possible. They provide you with several advantages, such as:
- Fast browsing speed
- Flexible connections
- Less power consumption
- High security
- Compatibility with mobile devices
What are the Different Types of VPN Encryption Systems?
Businesses increasingly use VPN as most workplaces have shifted to work-from-home mode. Individuals, realising the importance of data safety, are adopting VPNs quickly. To level up, check out a free VPN for Linux or visit VPNOverview to discover the latest deals, news, and updates in the VPN world.
While you do that, you should also learn about the different VPN protocols.
1. Internet Protocol Security (IPsec)
IPsec lets you securely connect to another network without exposing your data. Let us understand how it works below:
- You open your VPN application, which initiates a connection to the VPN server.
- Before any connection, IPsec uses Internet Key Exchange (IKEv2) to establish trust.
- After that, it verifies identity via a Pre-Shared Key (PSK) or digital certificates.
- The IPsec encrypted tunnel is established. Now, data from your PC gets encrypted, goes through the IPsec tunnel to the VPN server, and then gets decrypted before entering the website.
1. OpenVPN
It is an open-source encryption protocol that operates on the Transport Layer, rather than the network layer. The protocol uses the SSL/TLS cryptographic techniques to secure the connection. Here is how it works:
- You open your VPN application on your PC.
- The VPN application sends a request to the VPN server to establish a connection.
- OpenVPN performs a TLS handshake before encrypting data.
- Your VPN application then verifies the server’s identity using a digital certificate.
- After authentication, OpenVPN exchanges secure session keys (SSKs).
- Then the tunnel encryption begins, and at every step it checks whether the original data has been modified.
- If it finds that the data has been tampered with, it discards it.
1. Wireguard
Unlike OpenVPN and IPsec, Wireguard is a modern encryption protocol. It is simple, fast, and provides stronger security. Let us understand how it works below:
- When you open your VPN software on your PC, the application and server receive 2 keys: a public key and a private key.
- Once the keys are assigned, the peer authentication starts. Only connections with matching pairs form.
- Using the Noise Protocol Framework, WireGuard does a handshake to create a tunnel.
- After that, it generates temporary session keys, which rotate continuously. This is known as Perfect Forward Secrecy.
- When you access a website using a VPN, all your data gets encrypted and decrypted.
1. Layer 2 Tunnelling Protocol (L2TP)
Layer 2 Tunnelling Protocol (L2TP) does not provide encryption on its own. It uses IPsec for encryption while it creates the tunnel. Let us understand how it works:
- You initiate a connection to a site using a VPN.
- IPsec comes into play and negotiates security parameters. It uses Internet Key Exchange (IKE) for this.
- Now, a security association is created. IPsec generates encryption and authentication keys. At this stage, the communication channel is present, but no data is exchanged.
- After this, L2TP creates a logical tunnel to the VPN server. It then encapsulates the original data packet.
- IPsec then encrypts the original data packet, and the connection begins.
1. Secure Socket Tunnelling Protocol (SSTP)
Microsoft has developed this VPN encryption protocol. It is especially beneficial in networks where standard VPN protocols do not work. This can include corporate firewalls, public WiFi networks, or school networks. Here is how it works:
- You initiate a VPN connection using TCP Port 443.
- SSTP conducts a standard TLS handshake with the server.
- After this, the server sends an SSL certificate, which SSTP checks. If it fails, then the connection is rejected.
- Next, the session keys are generated so encryption can begin.
- Once the TLS is established, SSTP creates an encrypted tunnel. All communication then takes place inside this tunnel.
- SSTP then encrypts your internet data and protects it from third parties.
What is the Best VPN Encryption System For You?
The best VPN protocol depends on your specific needs. Here is a comparison chart so that you can choose the ideal one for yourself:
| VPN Encryption Protocols | Best For |
| Internet Protocol Security (IPsec) with IKEv2 | It is ideal for people accessing VPN through their mobile devices |
| OpenVPN | If security is your top priority, then this is the ideal choice. |
| Layer 2 Tunneling Protocol (L2TP) | Best for remote access VPNs. |
| WireGuard | For people who want speed, WireGuard is the best choice. |
| Secure Socket Tunneling Protocol (SSTP) | It is usually built into Windows. So it is best for specific use cases, rather than general browsing. |
Final Thoughts
VPN protocols are the foundation of secure internet access. Each protocol balances speed, compatibility, and security. WireGuard remains the best in the industry, but it is only available with certain providers. OpenVPN is the trusted choice if you want unmatched security. Once you understand how they work, you can make better choices that match your requirements.
