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by olalonde 688 days ago
It seems their Android app is open source... Maybe the protocol could be reverse engineered?

https://github.com/ProtonVPN/android-app

PS: Tried their free plan in China and it won't connect ("Connection Timeout"). In fact, I had to use another VPN to get past their app's loading screen (guessing it got stuck while doing a request to their server)...

1 comments

From a cursory glance, it seems to be Wireguard + TLS

https://github.com/ProtonVPN/android-app/blob/fc9e7f500fe56b...