Some services are slowly developing post quantum resistant protocols for their services like Signal or Tutanota. When will this be a thing for the web?

  • Spotlight7573@lemmy.world
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    1 year ago

    Considering this proposal is used for the key exchange, they definitely need to update both the client side and server side part to be able to make use of it. That’s the kind of thing that may take years but luckily it can fall back to older methods.

    It also needs to be thoroughly vetted so that’s why it’s a hybrid approach. If the quantum resistant algorithm turns out to have problems (like some others have), they’re still protected by the traditional part like they would have been, with no leaking of all the data.

    • CanadaPlus@lemmy.sdf.org
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      1 year ago

      So how does it work? I guess they exchange keys both ways and then hash them together?

      Honestly lattice encryption has been vetted for three decades now. We still can’t say for sure P is not NP, but I’m far more worried about someone getting a quantum computer early than a sudden breakthrough on breaking either kind of algorithm.

        • CanadaPlus@lemmy.sdf.org
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          1 year ago

          Huh. I guess whatever algorithm comes next is resistant to half of the secret being compromised, then.

          Edit: It looks like they concatenate things from the two algorithms a few times in the process, so maybe they figure it would be difficult to isolate a vulnerability assuming either one is strong.