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Joined 3 years ago
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Cake day: June 10th, 2023

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  • He got into working satellite internet before everyone else

    Satellite internet has existed before Starlink. What’s novel about starlink is that the satellites are much closer to earth, which allows for a low ping, but comes at the cost of needing to replace the satellites every few years, as they’ll deorbit by themselves, and needing a whole lot more of them. It only offers an advantage over cheaper alternatives (terrestrial internet or satellite internet in geostationary orbit) when you’re somewhere without proper infrastructure, and those areas tend to not be wealthy. So, the question is, is there enough demand to pay for replacing the entire constellation of satellites every few years?










  • Here’s my idea: Bob gives Alice a token, assigning her an unique random number n. Alice goes to Grace and tells her, “Somebody assigned me number n, can you verify that I’m allowed?” Grace then writes: “User n is allowed, signed Grace”. Alice then takes this letter and shows it to Bob. Bob now knows that Alice is allowed, but nothing else. Grace only knows that somebody wanted to know that Alice is allowed, not who that somebody is.

    Of note here: This system does nothing to protect against an allowed user helping a not allowed user to gain access, but I don’t think it’s possible to protect against traitorous users.