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Zcash

Zcash Shielded Assets (ZSAs): The OrchardZSA Protocol

DesignImplementation

QEDIT designed and built OrchardZSA — the protocol that brings user-defined assets (stablecoins, tokens, NFTs) into Zcash's shielded pool with the same privacy as ZEC.

OrchardZSA is a full protocol, not a feature. Extending Zcash's Orchard shielded protocol, OrchardZSA defines new issuance keys and asset identifiers, a note and commitment structure for custom assets, a version-6 transaction format, consensus rules for supply tracking and finalization, and an updated fee model — specified across two interdependent ZIPs, ZIP 226 (transfer and burn) and ZIP 227 (issuance).

Funded by more than $4M in Zcash Foundation and Community Grants over five years, independently audited by Least Authority, and being merged into Zcash's consensus-critical crates ahead of the NU7 upgrade, ZSAs are among the most substantial protocol design efforts we've undertaken.

For the complete technical reference — specifications, audits, research threads, tooling, and talks — see the ZSA Hub.

More protocol design work

Bank of Israel

Digital Shekel: Bank of Israel CBDC

Protocol

Selected by the Bank of Israel as one of 14 teams to develop use-cases for a potential digital shekel in its CBDC sandbox.

Deloitte

Zero-Knowledge Taxation with Deloitte

ProtocolImplementation

An end-to-end zero-knowledge system, built with Deloitte on the QED-it SDK, that computes life-insurance tax owed under France's 2018 rules without exposing a person's other contracts.

Zero-Knowledge Standards

zkInterface: A Standard for Zero-Knowledge Interoperability

DesignImplementation

An open standard, designed and built by QEDIT, for interoperability between zero-knowledge proof systems — letting circuits written in one framework be proved by another.