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ZCASH PRIVACY

Your Privacy Has an Expiration Date.

Zcash shielded transactions use Groth16 on BN254 -- quantum-vulnerable cryptography. When a cryptographically relevant quantum computer exists, every shielded transaction ever recorded becomes retroactively decryptable. H33 adds post-quantum privacy that does not expire.

Schedule Demo Privacy Layer Hub
NO QUANTUM EXPIRATION RISK DETECTEDVerified: --
LIVE ATTESTATION
Zcash Mainnet -- current anchor status
Connecting to Zcash...
EXPOSURE COMPARISON
What changes when H33 is in the path

Native Zcash (Groth16)

  • × Shielded pool metadata leakage
  • × Viewing key exposure risk
  • × Transaction graph analysis
  • × Timing correlation attacks
  • × Amount correlation attacks
  • × Network-level analysis
  • × Quantum-retroactive decryption
  • × No compliance mechanism

H33 Protected

  • ✓ Post-quantum shielded workflow
  • ✓ Attested execution proof
  • ✓ Hidden pool metadata
  • ✓ Proof-only compliance verification
  • ✓ 32-byte memo commitment
  • ✓ Independent verification
  • ✓ STARK-based attestation
  • ✓ Replay-grade evidence
ATTESTATION RECEIPT
What a verified attestation looks like
h33-74 attestation receipt
H33-74 ATTESTATION RECEIPT Receipt ID: h74_attest_... DAG Root: 0x... (depth: 4, nodes: 12) Proof Hash: 0x... (STARK, 128-bit PQ security) Replay Ref: replay://h33.ai/r/... Chain Anchor: Zcash Mainnet -- block ... Commitment: 0x... (32 bytes in memo field) SIGNATURES: ML-DSA-65: VALID (3,309 bytes -- MLWE lattice) FALCON-512: VALID (666 bytes -- NTRU lattice) SLH-DSA-128f: VALID (17,088 bytes -- hash-based) VERIFICATION: ALL CHECKS PASSED (20/20) HATS LEVEL: Level 1 Conformance CACHEE KEY: cachee://h33.ai/c/... Replay This Attestation --> Verify Independently -->
ATTESTATION PIPELINE
Five stages. 32 bytes on-chain.
01
Shielded Tx
Encrypted inputs from shielded pool
-->
02
STARK Proof
Post-quantum constraint satisfaction
-->
03
PQ Signatures
ML-DSA + FALCON + SLH-DSA triple sign
-->
04
Cachee Store
Full proof bundle persisted off-chain
-->
05
Memo Anchor
32-byte commitment in memo field
32 bytes on-chain. Full proof off-chain. Three PQ families. Zero data revealed.
DISCLOSURE BOUNDARY
What crosses the attestation boundary

NOT REVEALED

  • × Shielded amounts
  • × Sender identity
  • × Receiver identity
  • × Transaction graph
  • × Viewing keys
  • × Pool membership
  • × Timing patterns
  • × Amount correlations

ONLY REVEALED

  • ✓ Cryptographic validity
  • ✓ Compliance proof
  • ✓ PQ attestation
  • ✓ Attestation commitment
  • ✓ Verification status
  • ✓ Replay availability
  • ✓ PQ signature bundle
  • ✓ Chain anchor hash
MULTI-CHAIN WITNESSING
Anchored across:
Zcash
|
Bitcoin
|
Ethereum
|
Solana
Every attestation is witnessed across multiple chains. Cross-chain continuity.

Replay This Attestation

Inspect lineage. Inspect proof. Inspect DAG. Verify signatures.

Replay ProofView DAGVerify SignaturesHATS Verifier
Built For
Privacy-first users who need quantum resilience.
Privacy Advocates
Institutional Users
Compliance Teams
Zcash Ecosystem
Cross-Chain Bridges
Regulatory Bodies
EXPLORE
50 Live Systems 44 ZK Use Cases

Privacy without an expiration date.

32 bytes on-chain. Post-quantum attestation. Privacy that survives the quantum transition.

Schedule Demo

H33.ai, Inc. · Patents Pending · HATS Standard · Privacy Layer · H33-74