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Security & encryption
Proton VPN is a Switzerland-based VPN service that keeps no logs of your internet activity which can compromise your privacy. Our apps are all open source and use only the most secure VPN protocols. Below you can learn more about our privacy and security features.
Strong encryption protocols
Our apps use OpenVPN and IKEv2 because they are secure VPN protocols, and we implement them at their strongest encryption settings.
For example, both OpenVPN and IKEv2 use the following security features:
- AES-256 is an NIST-approved cipher that protects your actual data. It is used by the US government to secure top secret information.
- RSA-4096 is a cipher that secures the TLS key exchange used to establish a secure connection between your device and our VPN servers. There are no known methods to defeat RSA when used with a 4096-bit key size.
- Forward secrecy generates new keys for each VPN session, so even if one session is somehow compromised, no others are. Keys are also rotated regularly within each session
Our apps offer several additional security features to ensure your safety on the internet. DNS leak protection and IPv6 leak protection ensure that your data is always routed through our servers and never to a third party, for example. Meanwhile, our optional kill switch feature stops your internet connection if the VPN ever disconnects, keeping your data protected.