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A few months back I built a cryptographic alternative to CAPTCHAs called Ghost Keys[1] that uses a small donation as proof-of-humanity. For donating you get an
by sanity 1y ago
A few months back I built a cryptographic alternative to CAPTCHAs called Ghost Keys[1] that uses a small donation as proof-of-humanity. For donating you get an anonymous keypair that works across services without repeated CAPTCHAs. The economic friction doesn't scale for bot operators, and donations fund our non-profit[2].
[1] https://freenet.org/ghostkey/ https://freenet.org/ghostkey/
[2] https://freenet.org/ https://freenet.org/
- DoctorOW 1y ago> The economic friction doesn't scale for bot operators Does the number of keys need to scale? If $1 buys a key for life, and signing can be easily automated why would it stop bots?
- sanity 1y agoKeys embed approximate timestamps, so services can set age limits. The system was designed for Freenet integration where reputation can be attached to keys - repeat abuse would degrade a key's public reputation over time.
- Retr0id 1y agoIn the event ticket situation, how does this change the economics compared to just adding $1 to the ticket price? (or whatever your minimum donation threshold is)
- sanity 1y agoIt would add $1 to the ticket price, the goal is more to replace CAPTCHAs (which cost essentially nothing to defeat these days), but you're right that it wouldn't be a silver bullet in the ticket scalping scenario.