AI-Powered Deanonymization

AI dramatically lowers the cost and skill required to identify individuals from supposedly anonymous data. Research shows 99.98% of Americans are re-identifiable from 15 demographic attributes, and GPT-4 can infer personal attributes from Reddit posts with 85% accuracy at $0.15 per profile. AI transforms deanonymization from a specialist skill into a commodity capability, threatening pseudonymity and enabling targeted harassment, discrimination, and political repression.