Public Report – Zcash NU5 Cryptography Review

In March 2021, Electric Coin Co. engaged NCC Group to perform a review of the upcoming network protocol upgrade NU5 to the Zcash protocol (codenamed "Orchard"). The review was to be performed over multiple phases: first, the specification document changes and the relevant ZIPs, then, in June 2021, the implementation itself.  The Public Report for … Continue reading Public Report – Zcash NU5 Cryptography Review

Public Report – Electric Coin Company NU4 Cryptographic Specification and Implementation Review

In June 2020, the Electric Coin Company engaged NCC Group to conduct a security review of the six Zcash Improvement Proposals (ZIPs) that constitute the core of the upcoming Canopy (https://z.cash/upgrade/canopy/) upgrade (also called "NU4") to the Zcash network. This upgrade coincides with the first Zcash halving and will initiate a new development fund for … Continue reading Public Report – Electric Coin Company NU4 Cryptographic Specification and Implementation Review

Public Report – Electric Coin Company NU3 Specification and Blossom Implementation Audit

In October 2019, the Electric Coin Company engaged NCC Group to conduct a review of two Zcash improvement proposals (ZIP 213 and ZIP 221) and of the implementation of ZIP 208 within the Zcash node implementation. ZIP 213 proposes a change to consensus rules to allow coinbase transactions to target shielded addresses.  ZIP 221 describes … Continue reading Public Report – Electric Coin Company NU3 Specification and Blossom Implementation Audit