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[return to "Ask HN: Is it time for HN to implement a form of captcha?"]
1. FloorE+5Q[view] [source] 2026-01-08 23:51:05
>>Rooste+(OP)
I explored a startup idea that really didn't make sense unless there was a way to ensure users were unique humans in an anonymous and privacy preserving way.

Researched it substantially and realized it's an unsolved problem. Anything that makes a dent is incomplete and comes with ugly tradeoffs. For a time I wondered if I should try and solve it myself, but I could never think any solution that hadn't already been/being tried. Years later I'm left curious if it's even possible to solve the problem.

My point is that captcha won't solve this, and solving this problem is a lot harder than it seems at first, and might not even be solvable (which I know is hard to accept).

If someone does find an elegant privacy ensuring way to solve it, I think the impact would extend far beyond HN and could make a big difference to the future of civilization as a whole.

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2. baxuz+vS[view] [source] 2026-01-09 00:08:13
>>FloorE+5Q
It is a solved problem with ZKPs
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3. FloorE+0Z[view] [source] 2026-01-09 00:54:32
>>baxuz+vS
I studied ZKPs. You and I must have very different understandings of the actual scope of the problem. Like I said, everything that exists or is being worked on that makes a dent (including ZKPs) is incomplete or has ugly trade offs.

Maybe you are thinking purely from a math / theoretical perspective, but I'm thinking of a compete solution that's practical to use to solve the problem for sites like HN and many others.

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4. baxuz+s73[view] [source] 2026-01-09 18:09:56
>>FloorE+0Z
That is true, and I'm also working in the industry.

We are currently in dire need of ZKP providers / abstractions that will aggregate both eIDs and tradition IDV (scans).

However it's extremely important that the technical capability is there. The next step is to build upon it, and I think that it's a great time for something like this due to all the horrible implementations of identity verifications currently available — that is 3rd party companies collecting scans of documents and biometrics.

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