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Cake day: July 1st, 2023

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  • ilmagico@lemmy.world
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    toAsk Lemmy@lemmy.worldWhat gets you downvoted?
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    3 months ago

    Fun fact: as I discovered, “continents” are defined differently depending on which country you’re in, they are not the same worldwide. In Europe, America is a big continent and includes both north and south, and the continent including Australia is called “Oceania”. In “America” (USA), there’s North and South America as separate continents, and the continent including Australia is called … Australia… and yes, the USA is just America, because, yeah.




  • Now that I think about it, there is a problem: fingerprint & face ID are not 100% correct all the time, so they’d rather have false negatives than false positives, i.e. they’d rather deny access to someone who is authorized, rather than grant access to someone who is not. This is normally not a problem, cause if for whatever reason the biometric method doesn’t work (e.g. wet fingers, wearing gloves, wearing full face mask, etc) then you always have the PIN/passphrase … but with your 2FA idea this wouldn’t work anymore.


  • I think you’re getting downvoted because many people don’t understand exactly what you mean by 2FA, and especially, for what purpose.

    You could try to clarify that, but let me see if I get this right: You’d like to use 2FA as a more secure way to access your phone, having the phone require 2 factors to unlock it; not as a way to use your phone as one of the “two factors” for some other 3rd party account, right?

    Basically, you’d like a phone to support an authentication method requiring 2 factor to unlock the phone itself, for example both a PIN and fingerpring, or passphrase and face recognition, is that right? As in, one needs both factors, not one or the others. If so, yeah, I guess that could be pretty useful for the very security conscious among us.



  • That’s the sad state of things right now, but I hope things will change for the better, and crypto will become an acceptable way to keep and spend money (rather than ponzi ICO schemes, or sorry, “investment”). I also hope that more crypto switch to proof-of-stake to avoid the huge waste of energy, though that has its own problems as well (fears of more centralization, though this didn’t happen with ETH, or at least not yet).



  • Yes, unfortunately that’s the state of things currently, but I won’t call the prospect of using cryptocurrencies as actual currencies “dead and buried”, yet. Eventually the hype will subside and people who thought they could “make money quick” will leave the game, and those who wanted a decentralized way to keep their money, aware of all the pros and cons, will stay. Hopefully that will lead to a more stable value, and maybe, just maybe they’ll come back mainstream as an actual currency.

    This is really more what I hope than what I see likely to happen, but one can hope ;)


  • It’s “useless” now because prices are set in dollars, euro, yen or whatever fiat currency you use. Once somebody starts setting prices in bitcoin, monero, etc, then it won’t matter how it fluctuates, cause if you have 1 XMR and something costs 1 XMR, then your crypto money keeps the same buying power no matter what its value to the dollar is.

    Of course, we’re pretty far from that happening mainstream, and it’s actually pretty likely it will never happen (sadly, inho, but your opinion might differ).









  • The probability of getting both right the first time is easy: 0.25*0.25 = 0.625 or 6.25%

    The probability of getting exactly one right is: either you get the 1st one right and miss the second, or vice versa. Thats 0.25*0.75 + 0.75*0.25 = 0.5*0.75 = 0.375 or 37.5%, so the probability of getting at least 50% is 0.375 + 0.0625 = 0.4375 or 43.75%, even without retries, so pretty good odds. The probability of missing both is 1 - 0.4375 = 0.5625 (or 0.75*0.75).

    When you retry, there’s two possibilities:

    1. You missed both: now your probability of getting at least one of them right is: (1/3)(1/3) + 2*(1/3)(2/3) =~ 55.55%
    2. You got only one wrong: you just need to guess the other, so it’s 100% for you to get at least one, and 1/3 (33.33%) to get both

    So, including a retry, you either:

    1. Guess them both the first try: 0.0625 or 6.25%
    2. Guess one of them, then guess both: 0.375*(1/3) = 0.125
    3. Guess one of them, then still guess only one: 0.375*(2/3) = 0.25 or 25%
    4. Guess none first, then guess one: 0.5625*2*(1/3)(2/3) = 0.25 or 25%
    5. Guess none first, then guess both: 0.5625*(1/3)*(1/3) = 0.0625 or 6.25%
    6. Guess none, then still guess none: 0.5625*(2/3)*(2/3) = 0.25 or 25%

    So, probability of a passing grade is 75%. Not a very good test if it’s so easy to pass by random guessing ;)