Show HN: Fuse – Anonymous daily rate limits for logins and APIs with ZK proofs

Category: security

Tags: zero-knowledge-proofs, rate-limiting, privacy, anonymous-credentials, rln

Score: 7.3/10 (Innovation: 7, Technical: 8, Documentation: 8, Utility: 6)

Fuse is a privacy-preserving rate-limiting system that uses zero-knowledge proofs to enforce anonymous daily budgets for logins and API access. It combines RLN (Rate-Limiting Nullifier) with per-site pseudonyms to deter mass abuse without tracking identities, and includes a full stack: circuit, registry, log, gateway, SDK, and Chrome extension. The approach is innovative and technically sophisticated, though the project is an early prototype with unaudited cryptography.

Target audience: backend developers, security engineers, privacy-focused developers

Repository: https://github.com/veiovi/fuse · JavaScript · MIT

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