3 ms·

What?

• h43z 3mo ago
  By default SSH leaks all of the below public keys (if they exist) + all public keys in your ssh-agent to a server you connect to. ~/.ssh/id_ecdsa.pub ~/.ssh/id_ecdsa_sk.pub ~/.ssh/id_ed25519.pub ~/.ssh/id_ed25519_sk.pub ~/.ssh/id_xmss.pub ~/.ssh/id_dsa.pub running `ssh late.sh` would do exactly that. At the very bottom of the website they give you a command that would not leak your public keys. `ssh-keygen -t ed25519 -f ~/.ssh/late_throwaway && ssh -o IdentitiesOnly=yes -i ~/.ssh/late_throwaway late.sh` this would only send the late_throwaway public key
  • Zambyte 3mo ago
    Okay, but why is that something to be concerned about? How would one be able to probe to see if a server recognizes a public key? Why does that matter?
    • nntlol 3mo ago
      [dead]
    • prodigycorp 3mo ago
      so, i used my public key. can someone please tell me what i should be worried about now?
      • h43z 3mo ago
        If I have your public key I could probe a server to see if it recognizes that public key. Which would tell me information you might not want to be leaked.
        • Hugsbox 3mo ago
          Could you explain how/why that would be an issue? I still don't understand. Isn't the nature of public keys meant to be that they're public?
          • dmux 3mo ago
            I think what the other comment is getting at is that you're essentially leaving footprints behind on various servers and that information could be used to narrow down who you are, where you work, etc. For example, if you used the same key pair for a work machine at the big social media site example.com as you did late.sh, they could probe example.com's machine and see that you'd been there.
            • Hugsbox 3mo ago
              That sounds like the kind of edge-case thing that wouldn't be even slightly a problem for like 99.9% of people.
              • itsbczurstupid 3mo ago
                [flagged]
      • ErroneousBosh 3mo ago
        l33t h4xx0r5
      • plaidwombat 3mo ago
        All your base are belong to us. We recommend rotating keys more often than never.
      • stevekemp 3mo ago
        Github has public keys available, so the server owner could compare the key you sent to those - and that would identify your github username. Whether that's a concern or not is an open question, of course.