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Discord has a feature where you can log into your account on your PC by scanning a code on your phone.

So does Binance.

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Those are good things though? They’re about logging in, on purpose.

Not about attesting to Google that you have a proper smartphone as a proxy for your humanity, like this thing.

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To prove you're not a bot, scan this QR code with Discord.
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But none of those options are requirements to access the service.
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They're requirements to access my website though! To prove you're not a bot, scan this QR code - with Discord.
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So does Signal.
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But Signal is secure(TM)!
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