The premise reminds of discussions of computing in Ra. https://qntm.org/aum > "Don't talk about the future," Vidyasagar says. > "What? Why not?" > "Look at this computer," Vidyasagar says, gesturing at the mainframe. "Computers are getting more powerful, yes?" > "Sure." > "What is the most powerful computer that will be built? Ever. Not this year. Not this decade. What computer will be the most powerful? And how powe…
Becoming physically immune to brute-force attacks (2021)
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Re: Becoming physically immune to brute-force attacks (2021)
#72This is probably a decent estimate, but there's a couple of routes of attack it fails to account for. First it uses the current average temperature of the universe. Lowering the temperature can be done by just waiting a while before turning the machine on. I assume that powering a sufficiently powerful fridge is not an option, given the origin of the theoretical limit, but I can't quite point out why it wouldn't work…
If you wait for the temperature to drop, and the universe is expanding, distant galaxies will recede to the point that they are now moving away faster than the speed of light and their matter is no longer available to contribute.
Intersection of light cones, the expansion of the universe, and the Margolus–Levitin limit of computation is truly the ultimate secret.
5 picoseconds to respond, then you are disconnected from the system by the laws of physics.
No amount of frame-jacking via time dilation using black holes can cheat that captcha, or brute force that keyspace.
By the time you find the key, we are no longer connected in space-time/causality