Would it be possible for me to make comments to other instances etc?

Solved: I can’t, it would only work with a public domain.

            • Dandroid@dandroid.app
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              1 year ago

              I’m not sure I understand the question. They are used to encrypt traffic and prove that the entity hosting the site hasn’t changed by using a digital signature. These two together make it so third parties can’t read the traffic coming through. This is a requirement for modern internet. Otherwise your passwords wouldn’t be a secret because literally anyone would see them.

      • Perhyte@lemmy.world
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        1 year ago

        Additionally, HTTPS if very easy to set up nowadays and the certificates are free1.

        1: Assuming you have a public domain name, but for ActivityPub that’s already a requirement due to the push nature of the protocol.

        • dog@suppo.fi
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          1 year ago

          You can get Let’s Encrypt certificates for DuckDNS, so you don’t even need to own anything.