• KairuByte@lemmy.dbzer0.com
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    1 year ago

    So you’re literally arguing that knowable inputs, however unlikely knowing those inputs might be, run through known deterministic calculations, results in a guaranteed unknowable output?

    • FooBarrington@lemmy.world
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      1 year ago

      No, I’m arguing that the inputs aren’t knowable to the required degree in the general case, which defines their entropy, and that entropy isn’t mathematically lost, it’s improved through deterministic calculations.

      • KairuByte@lemmy.dbzer0.com
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        1 year ago

        The same was thought about previous iterations on random number generators. The first I am aware of used an extremely precise time stamp, and ran the calculations on that. On the assumption that no one could possibly know the exact timestamp used. That was obviously untrue, which can be verified by the fact that such systems have been broken before.

        Just because you can’t conceive of a way to know the values, does not make them unknowable. It just makes it improbable to happen.

        And again, I’m not saying the random numbers we can produce now are currently breakable. But that doesn’t mean that a decade from now, or even a century, they will remain unbroken.

        • FooBarrington@lemmy.world
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          1 year ago

          Say I’m restarting my phone, and it uses details like temperature fluctuations in CPU sensors as entropy. How would you know all the required values? Since I’m holding the phone in my hand, the temperature of my hand (and consequently body temperature) are relevant, not to mention the air around my phone. How would you find those values at the exact time the sensors are read?

          • KairuByte@lemmy.dbzer0.com
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            1 year ago

            You honestly think those values aren’t possible to estimate within a range then brute force?

            That’s like asking “say I hit a button at a very specific time, how would you find that exact time?”

            • FooBarrington@lemmy.world
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              1 year ago

              Yes, because 1) you’d need to know them with incredible precision, and 2) you can’t brute force, because you only have one chance. Otherwise you can also brute force anything that’s “truly random” as you put it.

              That’s like asking “say I hit a button at a very specific time, how would you find that exact time?”

              That’s the thing, it’s not like that. It’s more like “say I hit a button at a very specific time and roll hundreds of dice, how would I find that exact time and all the results of those dice”.

              • KairuByte@lemmy.dbzer0.com
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                1 year ago

                Apart from the face that there are absolutely no “dice rolls” involved. They are known deterministic calculations. Because in order to add “dice rolls” you would need randomness. You can’t have a non deterministic calculation involved, because that isn’t how computers work.

                You’re essentially saying “take a knowable input, add true randomness, output true randomness using nothing but knowable inputs!”

                And you absolutely can brute force it. Why would you have a single chance? Because of arbitrary rules?

                As for true randomness, you’re getting a range of “extreme low to extreme high” which isn’t currently brute forcible.

                • FooBarrington@lemmy.world
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                  1 year ago

                  My dude, the “dice rolls” are all the small pieces of entropy that you’d have to know the environment to an unknowable degree for. They are conceptually absolutely involved, and if you can’t understand that, we’re done here, because you’re handwaving over the difficult parts in a way that doesn’t make sense.

                  • KairuByte@lemmy.dbzer0.com
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                    1 year ago

                    Those “dice rolls” are not random though. The problem is you keep talking about these inputs as if they themselves are random. They aren’t. And just because you can’t fathom a way to know their values now, doesn’t mean they are unknowable. I point back to the timestamp issue, where at the time it was considered “enough” but was disproven as such years down the line.