KeyAudit is a free, privacy-preserving intelligence platform that queries 6.94M+ leaked wallet records across 28 blockchains. It accepts an address, BIP-39 mnemonic, or private key and returns a trust-ranked verdict using a five-tier confidence model: `confirmed_stolen`, `sanctioned`, `academic_dataset`, `community_curated`, or `dict_derived`.

Unlike centralized checker services, KeyAudit hashes all seed and key inputs client-side via WebCrypto `SubtleCrypto.digest()` (SHA-256) before transmission. No plaintext secrets are logged or stored. The tool also includes a BIP-39 validator, brain-wallet derivation engine, and bulk dictionary importer for adversarial testing.

All source data is publicly credited on `/en/source` and drawn from 25+ curated leaks, darknet dumps, and academic research datasets. The `dict_derived` tier is explicitly labeled as a theoretical match — it indicates an address-hash collision from a password dictionary, not a proven compromise.