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Cap: Lightweight, modern open-source CAPTCHA alternative using proof-of-work

capjs.js.org

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Re: Cap: Lightweight, modern open-source CAPTCHA alternative using proof-of-work

#51

Post by throitallaway »

pkkkzip wrote: post #39

How does this compare to Anubis, another similar PoW based CAPTCHA? Paired with this, and if there is a way to block out DDOS https traffic then we might be able to stop dependence on Cloudflare altogether.

I'd be so happy if the Internet moved away from Cloudflare for Captcha. I got on their "bad list" at one point (for who knows why), and no matter how many times I checked the "I am a human" box their Captcha wouldn't let me through for a few days. I was unable to login to the portal of a product that we pay for. It was such a frustrating experience.

Re: Cap: Lightweight, modern open-source CAPTCHA alternative using proof-of-work

#54

Post by tiagozip »

woah wrote: post #42
internetter wrote: post #20

Earlier quoted context omitted.

I like the citizen science idea, the bitcoin one is so shitty. There was an epedemic of websites covertly mining in browsers a while back and this is a dangerous road to go down.

The entire purpose of this library is to covertly mine in browsers

no, it's not mining crypto.

Re: Cap: Lightweight, modern open-source CAPTCHA alternative using proof-of-work

#55

Post by tiagozip »

pkkkzip wrote: post #39

How does this compare to Anubis, another similar PoW based CAPTCHA? Paired with this, and if there is a way to block out DDOS https traffic then we might be able to stop dependence on Cloudflare altogether.

anubis is more like Cap's checkpoint, but still the implementation is very different.

Re: Cap: Lightweight, modern open-source CAPTCHA alternative using proof-of-work

#56

Post by tiagozip »

emseetech wrote: post #14
detaro wrote: post #5

So why does this make the user still click something?

Probably to demonstrate. Attaching to a form submission or any modifying action would work.

yeah i also recommend trying out the invisible mode

Re: Cap: Lightweight, modern open-source CAPTCHA alternative using proof-of-work

#57

Post by darknoon »

If you were doing a lot of scraping, you could just solve this on a GPU in 1/10 or less of the time it takes a human's phone to do it. Generally you need a decent computer to render a webpage while scraping it these days, so I don't see what this is solving.

Re: Cap: Lightweight, modern open-source CAPTCHA alternative using proof-of-work

#58

Post by tiagozip »

darknoon wrote: post #57

If you were doing a lot of scraping, you could just solve this on a GPU in 1/10 or less of the time it takes a human's phone to do it. Generally you need a decent computer to render a webpage while scraping it these days, so I don't see what this is solving.

scrapers usually don't render a webpage, else their scraping wouldn't be efficient at all.

Re: Cap: Lightweight, modern open-source CAPTCHA alternative using proof-of-work

#60

Post by nicwolff »

Did no-one click through to the technical white paper?

https://www.researchgate.net/publication/374638786_Proof-of-...

"Proof-of-Work CAPTCHA with password cracking functionality"

The "work" is "to use the distributed power of webusers’ computers" to "obtain suspects’ passwords in order to access encrypted evidence" and "support law enforcement activities".

Funny how that isn't mentioned anywhere in the linked site.

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