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rootkovska's profile
Joanna Rutkowska
Joanna Rutkowska
Joanna Rutkowska
Verified account
@rootkovska

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Joanna RutkowskaVerified account

@rootkovska

Strategy & security at @golemproject. Previously: founder of @QubesOS and Invisible Things Lab. Distrusts computers.

Warsaw
blog.invisiblethings.org
Joined July 2014

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    1. Joanna Rutkowska‏Verified account @rootkovska Nov 3

      I've been trying to figure the essential _features_ of the The Ethereum (computer) vs. mere _implementation_ "details"; so far have come up with: 1. strong integrity protection for your code (customarily called "smart contract"), 2. strong availability for your code. (1/)

      7 replies 26 retweets 67 likes
      Show this thread
    2. Joanna Rutkowska‏Verified account @rootkovska Nov 3

      (2/) The price we pay for these: 1. Lack of confidentiality for our code, 2. Huge performance penalty. We now try to fix both problems by reducing decentralization: offchain computation in TEEs like SGX (which always will have single root of trust -- CPU vendors), sharding.

      4 replies 5 retweets 33 likes
      Show this thread
    3. Joanna Rutkowska‏Verified account @rootkovska Nov 3

      (3/) The "decentralization" is a mere implementation detail. OT1H it allows us to have integrity and availability for our code, OT2H it ruins privacy and performance. The challenge is to find the right tradeoff. But "decentralization" doesn't give us anything in itself, does it?

      7 replies 7 retweets 25 likes
      Show this thread
      Joanna Rutkowska‏Verified account @rootkovska Nov 3

      (4/) So, if I could, say, launch a traditional server onto an Earth's orbit, perhaps this would be "reasonably" as good a solution as Ethereum? Assuming the root account was disabled and the cost of shooting it down (physically) was high enough?

      2:27 AM - 3 Nov 2018
      • 8 Retweets
      • 27 Likes
      • Gastón Silva 🍿 🍨 munch 🍨 Master Looper Veselin Kostadinov Crypto Griff Jonathan Sterling Jayden Crypto 💎 Bill Stewart Samyak Jain
      12 replies 8 retweets 27 likes
        1. New conversation
        2. Alfie John‏ @alfiedotwtf Nov 3
          Replying to @rootkovska

          If you’re thinking of playing with smart contracts, you might want to look at Michelson on Tezos rather than Solidity on Ethereum

          2 replies 0 retweets 2 likes
        3. Pastryarch‏ @amias Nov 3
          Replying to @alfiedotwtf @rootkovska

          Or iele which will have formal verification https://iohk.io/blog/iele-a-new-virtual-machine-for-the-blockchain …

          1 reply 1 retweet 2 likes
        4. Alfie John‏ @alfiedotwtf Nov 3
          Replying to @amias @rootkovska

          Damn, very nice!!

          1 reply 0 retweets 1 like
        5. Pastryarch‏ @amias Nov 3
          Replying to @alfiedotwtf @rootkovska

          It will be out pretty soon

          0 replies 0 retweets 1 like
        6. End of conversation
        1. New conversation
        2. Walter van Holst‏ @whvholst Nov 3
          Replying to @rootkovska

          Satellites are vulnerable to ASAT missiles, unless in higher orbits, the latter making connectivity more problematic. Connectivity already is a weak spot of this idea.

          3 replies 0 retweets 3 likes
        3. Lukasz Olejnik‏ @lukOlejnik Nov 3
          Replying to @whvholst @rootkovska

          Launching missiles is typically costly (not speaking of the cost of the actually missile launch).

          1 reply 0 retweets 0 likes
        4. Walter van Holst‏ @whvholst Nov 3
          Replying to @lukOlejnik @rootkovska

          For ASAT purposes, suborbital launches are sufficient. Precision is key, but these systems are much cheaper than satellite launchers https://en.wikipedia.org/wiki/ASM-135_ASAT …

          1 reply 0 retweets 1 like
        5. Lukasz Olejnik‏ @lukOlejnik Nov 3
          Replying to @whvholst @rootkovska

          Yes, but the political implications would be huge. That’s why I already replied in my previous tweet ;-)

          0 replies 0 retweets 1 like
        6. End of conversation
        1. nothingmuch‏ @mHaGqnOACyFm0h5 Nov 3
          Replying to @rootkovska

          pic.twitter.com/k1xJ7gdqHp

          0 replies 0 retweets 3 likes
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        1. New conversation
        2. Marcelo 'Not Giving Away GenCoin' Odin‏ @sokon_m Nov 3
          Replying to @rootkovska

          Any part of a server could fail. Even with redundancy, bizantine faults happens. In orbit, the server would be more exposed to cosmic rays (https://m.slashdot.org/story/322717 ). Software bugs could not be fixed, nor software forked. Security of the launching process could be compromised.

          1 reply 0 retweets 2 likes
        3. Marcelo 'Not Giving Away GenCoin' Odin‏ @sokon_m Nov 3
          Replying to @sokon_m @rootkovska

          Redundancy, antiredundancy, and the robustness of genomeshttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC122203/ …

          0 replies 0 retweets 0 likes
        4. End of conversation
        1. millettjon‏ @millettjon Nov 3
          Replying to @rootkovska

          Maybe @ElonMusk could make space for open source hardware of this type in Starlink satellites.

          0 replies 0 retweets 1 like
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        1. millettjon‏ @millettjon Nov 3
          Replying to @rootkovska

          Analogous to where the Westworld hosts escaped to.

          0 replies 0 retweets 1 like
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        1. Peer Stritzinger‏ @peerstr Nov 4
          Replying to @rootkovska

          At least that wastes no more energy than blockchain

          0 replies 0 retweets 0 likes
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        1. Watson Ladd‏ @WatsonLadd Nov 3
          Replying to @rootkovska

          Do not underestimate the space environment's impact on electronics!

          0 replies 0 retweets 0 likes
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        1. Kosyrev Serge‏ @_deepfire Nov 3
          Replying to @rootkovska

          Chief complaint is things must evolve, and that's somewhat impossible with unreachability-based trust. And with stealth hardware implants out in the wild, guarantees of this kind of isolation are too weak anyway. But I like the consideration of price we have to pay for trust..

          0 replies 0 retweets 0 likes
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        1. scriptjunkie‏ @scriptjunkie1 Nov 3
          Replying to @rootkovska

          Then we'd all be trusting you for the integrity of the computations since you assembled the hardware, you could backdoor things. The point of Eth is that everyone's checking your work, so theoretically nobody can alter it.

          0 replies 0 retweets 0 likes
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        1. John C. Vernaleo‏ @jcvernaleo Nov 3
          Replying to @rootkovska

          Multiple satellites is probably the cheapest way to make shooting it down expensive (and protects against the very real problem of the junk floating around up there).

          0 replies 0 retweets 0 likes
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        1. Pepo‏ @pepoospina Nov 3
          Replying to @rootkovska

          Resilience is another essential. Real environments are not free motion in vacuum. You need a system that can absorb hits.

          0 replies 0 retweets 0 likes
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