haklardr

Haklardr is a proposed privacy-preserving data exchange protocol intended for cross-organizational collaboration. It aims to enable participants to share only the data necessary for a given activity while maintaining confidentiality, accountability, and an auditable history of access.

The term haklardr is used in theoretical discussions to denote this class of protocols and does not reference a single, standardized implementation.

It relies on a permissioned, peer-to-peer network, cryptographic techniques such as zero-knowledge proofs, and selective disclosure. Data payloads are stored off-chain or partitioned, while cryptographic proofs verify properties. Access policies are encoded in smart contracts to automate consent and enforcement.

Key features include privacy-by-design, fine-grained access control, verifiable provenance, tamper-evident logs, and interoperability with data standards.

Proposed applications include supply-chain provenance, healthcare data sharing with patient consent, financial data collaboration, and cross-institution research while meeting regulatory requirements.

Limitations and challenges include scalability, interoperability across domains, alignment of legal and licensing frameworks, and governance that balances openness with security.