Zcash

Zcash receives a B- risk grade (30/100) from Hindenrank, where lower scores indicate lower risk. Moderate risk — strong cryptographic foundations and 8+ years of operation, but privacy features create regulatory friction and zk-SNARK complexity introduces supply auditability concerns. Zcash is a privacy-focused cryptocurrency launched in 2016 that uses zero-knowledge proofs (zk-SNARKs) to enable fully shielded transactions. With a market cap of approximately $9.4 billion and a 21 million token cap matching Bitcoin's, ZEC ranks among the top 30 cryptocurrencies. Its B- grade reflects 8+ years of operation with strong cryptographic research backing, balanced against the inherent complexity of zk-SNARK implementations (a 2019 disclosure revealed an undetected infinite counterfeit vulnerability that was patched without exploitation, and nine CVEs were patched in April–May 2026) and significant regulatory risk from privacy features that have led to exchange delistings in multiple jurisdictions.

The key risks identified for Zcash are: (1) Zcash's zk-SNARK privacy system is mathematically complex. A 2019 vulnerability disclosure revealed a bug that could have allowed unlimited undetectable token creation within shielded pools. The bug was patched without being exploited, and the newer Orchard protocol eliminates the trusted setup, but the complexity of the cryptography means similar undiscovered vulnerabilities cannot be ruled out. (2) Privacy features have caused exchange delistings and restrictions in South Korea, Japan, and other jurisdictions. Over 30% of ZEC supply is now in shielded pools, increasing the protocol's regulatory profile. The SEC closed its Zcash investigation without enforcement action in January 2026, and Grayscale filed for a spot ZEC ETF in May 2026, but non-US regulatory risk remains active. (3) The development fund (20% of block rewards) reduces miner revenue compared to Bitcoin-like chains. After the November 2024 halving (reward now 1.5625 ZEC), the combined effect puts pressure on the security budget. The lockbox portion (12% of rewards) accumulates funds without a current withdrawal mechanism, though ZIP 1016 coinholder voting is in internal testing with a governance poll expected in June 2026. (4) The ongoing migration from zcashd to zebrad and NU7 upgrade (testnet live May 22, 2026) represent significant infrastructure changes. Nine CVEs were patched in April–May 2026, including four consensus-critical bugs. While no exploitation occurred and a $1M bug bounty is active, transitions in privacy-critical codebases require sustained security review.

Zcash scores 30/100 across eight risk dimensions: Mechanism Novelty: 3/15, Interaction Severity: 4/20, Oracle Surface: 0/10, Documentation Gaps: 2/10, Track Record: 5/15, Scale Exposure: 9/10, Regulatory Risk: 2/10, Vitality Risk: 5/10. The highest risk area is Scale Exposure at 9/10.

Among 56 rated L1 protocols on Hindenrank, Zcash ranks #22 by safety (lowest risk score = safest). Its 30/100 risk score and B- grade place it in the middle tier of L1 protocols.

Zcash scores 5/15 on the Track Record risk dimension, indicating some history of security incidents or exploits. Higher scores reflect more severe or frequent incidents. Review the full risk report for details.