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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.

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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.

In my case the harsh firewall settings made by my company on our laptops were showing a red flag on captchas WAFs etc

One of many reasons people use Cloudflare is that they effectively hide your real static ip, at least for low effort actors. It's not just about DDOS.

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

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