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TACo

TACo (Threshold Access Control) is a free and open-source cryptographic public-good project for condition-based, end-to-end encrypted data sharing. It provides developers with APIs and an SDK to apply programmable access controls without centralized data custodians or single points of failure.
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Description

TACo is threshold access-control infrastructure managed by the World Ethical Data Foundation. Application developers can integrate its TypeScript/JavaScript SDK to encrypt data, define programmable on-chain and off-chain access conditions, authenticate requestors, and have independently controlled nodes collectively provide decryption material when conditions are met. It is intended for privacy-preserving Web3 applications and use cases such as decentralized social networks, storage and databases, AI workflows, sensitive-data sharing, and access-controlled signing.