## Colophon tags:: [[&paper]] [[age restriction]] url:: https://www.cs.columbia.edu/~smb/papers/age-verify.pdf date:: [[2026-06-18]] %% title:: Privacy-Preserving Age Verification—and Its Limitations type:: [[literature-note]] file:: status:: [[bean]] published:: %% ## Notes short:: link to [[Age Assurance Online - A Technical Assessment of CurrentSystems and Their Limitations - 20260618]]