Mawoka
39 lines
1.7 KiB
Svelte
39 lines
1.7 KiB
Svelte
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- This Source Code Form is subject to the terms of the Mozilla Public
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- License, v. 2.0. If a copy of the MPL was not distributed with this
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- file, You can obtain one at https://mozilla.org/MPL/2.0/.
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-->
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<svelte:head>
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<title>ClassQuiz/docs - PoW</title>
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<meta
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name="description"
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content="Use-case of PoW for ClassQuiz, the open-source quiz-application"
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/>
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</svelte:head>
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<article
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class="prose prose-sm sm:prose lg:prose-lg xl:prose-xl mx-auto mt-10 prose-slate px-4 dark:prose-invert"
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>
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<h1>PoW</h1>
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<h2>Why is it loading so long?</h2>
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<p>
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Your browser is calculating something to prevent abuse. The time it takes depends on the
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power of your CPU and, believe it or not, luck. Sometimes it takes like 5 seconds, sometimes
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30 secs, so please be patient. If you want to know what's going on, go to the <a
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href="#technical">technical part</a
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>.
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</p>
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<h2 id="technical">Technical Part</h2>
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<p>
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The technique used, is called PoW, or Proof of Work. It is a way to "pay" for something by
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using your CPU. It's mainly used in crypto-stuff, but not in ClassQuiz. It's just used to
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prevent spam. Imagine it like a small fee you have to pay to upload an image, but you don't
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pay with money, instead by using your CPU intensively. The Proof of Work-algorythm used is
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called HashCash and is also used by Bitcoin. All in all, it's really simple (if you know
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what hashes are). Let me explain:
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<br />
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You're hashing a string with a counter until the first x characters (in this case 4) are "0"/zeros.
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That's it. Then, you send the counter to the server, who hashes it once, checks if the first
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x characters are really "0" and that's it.
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</p>
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</article>
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