Nullius Protocol

Problem Statement

AI agents today must authenticate to services using identity-linked credentials (API keys, OAuth tokens), creating cross-service identity trails that enable surveillance, profiling, and correlation attacks. As agents proliferate, this becomes an existential privacy problem — every transaction, payment, and reputation signal is linkable. No existing solution provides privacy-preserving authentication with accountability. Nullius solves this with zero-knowledge proofs: agents prove they have valid credentials without revealing who they are, while cryptographic rate limiting (RLN) and threshold tracing ensure bad actors can still be held accountable.