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VPN Glossary

Encryption

Encryption is what makes VPN traffic unreadable to third parties while it travels between your device and the VPN server/node. Strong VPN encryption use...

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Encryption

Encryption is what makes VPN traffic unreadable to third parties while it travels between your device and the VPN server/node. Strong VPN encryption uses modern, vetted algorithms and secure key exchange so that even if someone captures your packets on public Wi-Fi, they can’t decrypt the contents. Common building blocks include AES for symmetric encryption in many OpenVPN and IPsec configurations, and ChaCha20-Poly1305 in WireGuard. But encryption is only part of the story: you also need integrity (to prevent packet tampering), authentication (to prevent impersonation), and correct implementation (to avoid leaks and downgrade attacks). Marketing often fixates on “AES-256,” but practical security depends on the full protocol suite and configuration. Encryption does not hide who you’re talking to if DNS or routing metadata leaks, and it does not prevent websites from tracking you via cookies or accounts. Use encryption in a layered way: VPN + HTTPS + privacy-respecting browser settings. In DVPN contexts, encryption protects each hop, but exit behavior still matters - treat exits as semi-trusted and avoid non-HTTPS destinations for sensitive work.

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