VPN obfuscation is the technique that hides the fact that you are using a VPN at all. It only needs to recognise the shape of a VPN connection and drop it. It is not a VPN protocol, which is the first thing to understand about it. Stealth: Wrapping the Tunnel in TLSStealth is Proton VPN’s obfuscation protocol, and it hides a VPN connection inside an ordinary-looking encrypted web session. FAQWhat is VPN obfuscation?