Zakura already uses private information retrieval for Zcash coinholder voting lookups and transparent wallet monitoring.

Overview Debates Related claims Topics Sources

The Blockchain Association argued that permissionless protocol participants should not face blanket identification or geolocation obligations when interacting only with public wallet addresses.

Zakura developer Adam Tucker stated that a single published shielded address exposes payment histories until Project Tachyon's recursive proof upgrade deploys.

A quantum computer running Shor's algorithm could theoretically recover an incoming viewing key from a publicly exposed Zcash address to link an account's wider payment history.

Zcash developers have targeted January 2027 for introducing post-quantum signature opcodes to protect transparent transactions.

Zcash developer Zakura proposed assigning a one-time incoming viewing key to every ZEC swap routed through NEAR Intents to protect transaction privacy against future quantum computing risks.

NEAR Intents permanently publishes a user's Zcash refund address on NEAR's public blockchain during cross-chain swaps, creating a public record even if no refund occurs.

Zakura's design uses private information retrieval to enable wallets to look up refund transactions during restoration without exposing queried addresses to database operators.

Hardware wallets will support Zakura's one-time viewing key design once their respective firmware accommodates the new key derivation process.

Zakura rejected creating separate Zcash accounts for each transaction because Keystone hardware wallets sign only from account index 0 and Ledger devices require separate approvals for each account.

Zakura's proposal limits potential quantum exposure to a single swap while keeping a wallet's main spending key unchanged, maintaining funds under a single account.

Software wallets using Zakura's open-source libraries, such as Vizor, could integrate the per-swap viewing key feature within weeks.

Zcash Open Development Lab CEO Josh Swihart stated in May 2026 that between $600 million and $700 million had flowed through Zcash's NEAR Intents route.

Shielded Labs announced project Epoch on October 1, 2026, aiming to develop post-quantum cryptography for Zcash by the end of 2027.

Nym CEO Harry Halpin criticized the crypto wallet disclosure rule in Amendment I-CF821, citing a case where a French tax agent allegedly sold crypto holders' tax data to criminals

StarkWare demonstrated a Private Know Your Customer system on June 23, 2026, using zero-knowledge proofs on mobile devices to verify identity criteria without exposing full passport documents.

StarkWare announced the launch of Shadow Accounts on October 13, 2026, allowing decentralized finance users to create persistent, application-specific identities without exposing links to their primary crypto wallets.

StarkWare introduced its STRK20 privacy framework on June 9, 2026, providing zero-knowledge shielded balances, private transfers, and viewing keys for auditing ERC-20 assets on Starknet.

StarkWare launched OffMarket, a privacy service that enables users to trade on Polymarket without publicly linking their trading positions to their primary accounts.

Financial Privacy Inc. holds OffMarket's master viewing key in a secure enclave under a multisignature arrangement with StarkWare, screening deposits against sanctions and reviewing legal requests for transaction data.

When withdrawing from a Starknet Shadow Account, funds return to shielded STRK20 balances using zero-knowledge proofs managed by a Starknet wallet