I'm curious, what's the basic logic behind a VPN? How does it work by encrypting data flow, and what protocols does it use? In what situations is it most effective? For example, what features should we focus on for both security and speed?
VPNs hide internet traffic by encrypting it and routing it through a secure server.
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The basic idea behind a VPN is actually quite simple but effective: it encrypts your data to protect your internet traffic from third parties. For example, I often use a VPN to access banking services in Turkey when I'm abroad. Thanks to encryption, my traffic appears secure on the bank’s network, as if I were in Turkey. In this system, your data is first sent to the VPN server and then forwarded to the target address. This hides your IP address, making it impossible to track your location.
When it comes to protocols, the most popular options that get the job done are OpenVPN, WireGuard, and IKEv2. OpenVPN has been the most reliable choice for years, but WireGuard has recently gained popularity due to its speed and lightweight nature. I’ve been using WireGuard lately, and it’s been more stable than I expected. If you need to balance speed and security, you should also pay attention to server locations. Connecting to a server in the US, for instance, would significantly increase latency for someone in Asia.