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It took a year to ship WebAssembly in Anubis

https://anubis.techaro.lol/blog/2026/anubis-wasm/
30•xena•52m ago

Comments

chews•31m ago
It's wild to me that PoW systems are how we sort the bot problem... the bummer is that all this "work" is just wasted cycles, at least in crypto there is a token you can sell.
Levitating•13m ago
> at least in crypto there is a token you can sell

That would defeat the purpose. The goal is to make scraping costly, not profitable.

cozzyd•11m ago
I guess it could in principle be profitable for the website, not the client?
TacticalCoder•7m ago
Yup was thinking the same: make honest people pay $0.00001 when they visit the site (in electricity/compute), have the challenge made so that only the website wins a tiny something. Bleed the bots dry.

> This makes Anubis challenges use a memory-hard proof of work function (argon2id) instead of just a CPU hard one. It also means that the "hey Claude vibeslop me a CUDA Anubis solver" route is on its way to being fundamentally dead.

Nice.

xosc•6m ago
unfortunately at that point it would be indistinguishable from running cryptojacking on your website
articulatepang•5m ago
Scraping would be costly in this world: scrapers would have to spend tokens in order to get the webpage.

But, in this world, the website owner would receive tokens that they can then use to do whatever they want, including paying for servers and bandwidth. This is the sense in which the cycles aren’t wasted: the website owner now has cash to spend.

Effectively, both scrapers and ordinary users would be paying for the privilege of getting website bytes.

This also solves the problem of having to wait for your phone to solve the challenge while you’re browsing: you can buy or mine some tokens ahead of time and pay them as soon as challenged. So can the scrapers, but because they’re accessing enormous numbers of pages it’s hopefully prohibitively expensive for them.

Retr0id•24m ago
See also:

https://github.com/eternal-flame-AD/pow-buster - Browser extension that already used WASM to accelerate the anubis solver, among others.

https://github.com/kasper93/anubis_webgpu - Browser extension that uses webgpu, for another order-of-magnitude speedup (depending on your GPU of course).

0x696C6961•21m ago
It would be cool if the POW could be done ahead of time. That way I don't get stuck waiting while I'm working. Some type of credit/tokens that my browser could then spend.
xena•20m ago
I'm working on this with a private prototype. I'm probably going to lean towards using a Service Worker (https://developer.mozilla.org/en-US/docs/Web/API/Service_Wor...) to renew challenges at a reduced difficulty. Stay tuned!

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