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    ChaChaPoly vs AES

    OpenVPN
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    • B
      blackops786187 last edited by

      Hi,

      I can see the option to use the chacha poly encryption method. From my brief readings, it is useful for devices which dont have hardware accelerated AES. Would this method provide a significant speed increase when openvpn is used in mobile devices?

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      • jimp
        jimp Rebel Alliance Developer Netgate last edited by

        Possibly. It depends on the device. It is an AEAD cipher like AES-GCM, and is quite fast. But the only way to know for sure is to test it in your environment.

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        • B
          blackops786187 @jimp last edited by

          @jimp What tools would be best?

          I hear desktop can be tested using open SSL however i dont know how to test it on mobile devices like android or ios

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          • jimp
            jimp Rebel Alliance Developer Netgate last edited by

            It isn't something you'd check directly like that. Setup a VPN using that cipher and run a speed test across it. Try a couple different types of AEAD ciphers and compare.

            IPsec can use AES-GCM
            WireGuard uses ChaCha20-Poly1305
            OpenVPN supports both AES-GCM and ChaCha20-Poly1305

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