Anonymous age verification with passkey-powered encryption
This project has been kicking around in my head since I first heard about the webauthn PRF extension in early 2024. I've slowly chipped away at it since, and finally got things to a shareable state over the summer thanks to a very fun parental leave. Headed back to work tomorrow, so I figure there's no time like the present. tldr: A client-held encryption key derived during passkey authentication encrypts all sensitive user data prior to persistence so that only the user is able to decrypt and reuse that data on their device. This allows short-lived, privacy-preserving age proofs to be…
In plain words
Anonymous age verification with passkey-powered encryption is a privacy-focused identity platform that uses passkey authentication and user-held encryption keys to verify age without exposing personal information. Sensitive data remains encrypted on users' devices, enabling one-tap age confirmation for applications needing proof of personhood while preventing unauthorized access. It's designed for AI platforms combating bot accounts and automated model distillation, but serves any application requiring frictionless identity verification without traditional password vulnerabilities or slow email-based flows.
written from the facts on this page · September 2026
From the sources
Private, passkey-first identity with user-held encryption and anonymous age verification.
Passkey-first authentication. Universal Identity. Private by design. Sensitive data stays encrypted at rest. No readable Personal Identifiable Information (PII) is stored. User-held encryption keys unlock reusable, one-tap age verification without exposing sensitive data. One-tap, anonymous confirmation that an account belongs to a verified person. Designed for AI platforms working to limit bot accounts and prevent automated model distillation, but useful anywhere an application needs frictionless proof of personhood. Passwords can be guessed or phished. Email login flows are slow and vulnerable to phishing. Passkeys are fast and phishing-resistant. Some applications need to know that a…from loginwithone.com
In the maker’s words, at launch
This project has been kicking around in my head since I first heard about the webauthn PRF extension in early 2024. I've slowly chipped away at it since, and finally got things to a shareable state over the summer thanks to a very fun parental leave. Headed back to work tomorrow, so I figure there's no time like the present. tldr: A client-held encryption key derived during passkey authentication encrypts all sensitive user data prior to persistence so that only the user is able to decrypt and reuse that data on their device. This allows short-lived, privacy-preserving age proofs to be issued to requesting applications (18+, no PII shared) without requiring users to re-upload their documents. The SSO user experience is built on top of the OAuth 2.0 Authorization Code Flow. https://loginwithone.com - demo video + high-level architecture + FAQ I also made the parody demo apps from the video public if anyone wants to play around with the user experience: https://demo.brainrot.loginwithone.com https://demo.dgnrt.loginwithone.com https://demo.kirby.loginwithone.com I suspect most will choose to pass on the ID stage for now (no offense taken, doing so is low reward in this context) but if you navigate to https://app.loginwithone.com after onboarding you can demonstrate the passkey-powered encryption on your email via the lock/unlock button. Very open to feedback and happy to answer any questions! I plan to pull the client-side encryption functionality into an open-source typescript library for general use, so any thoughts or suggestions on what you’d like to see out of that interface would be supremely useful. Thanks all, Michael
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Life & fun · 10d ago · louisabraham.github.io
- SA
Hello HN! I found that picking out plausible but diverse skin tones for my digital art and game development projects was kind of difficult, and I got curious about if there was a way to define a color space that made it easy. I've built a color picker and procedural generation algorithm based on the space as well as a bunch of other fun js features and demos throughout the page that use the equations. If you find it interesting, I have lots of explanations of how I built it and what properties the space has. The methodology might be a bit shaky, but hopefully the result is as helpful for…
Life & fun · Aug 2026 · toneyalexander.github.io
I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.
AI · 17d ago · simedw.com