Starknet wallets handle zero-knowledge proof generation and shielded balance data during Shadow Account operations without requiring developers to access users' viewing keys.

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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

StarkWare introduced the STRK20 framework on June 9, 2026, providing shielded balances and private transfers for supported ERC-20 assets on Starknet.

Starknet Shadow Accounts allow users to manage decentralized finance positions without publicly linking their application activity to primary cryptocurrency wallets.

OffMarket is not owned or created by Polymarket and has no formal partnership with Polymarket, operating independently as part of Polymarket's verified builder program

OffMarket allows users to retain control of their keys in their browsers, while OffMarket's derived wallets are managed via user signatures to ensure non-custodial wallet recovery if OffMarket goes offline

OffMarket cannot mask public transaction sizes, order prices, execution timing, or public USDC pool transfers, which can potentially expose trader identities during low liquidity periods.

OffMarket executes private orders on Polymarket against existing order books, liquidity, and market prices, while enforcing Polymarket's normal taker fees and geographic restrictions against U.S. users.

Starknet's Shadow Account balances and transactions remain publicly visible on the blockchain, but the connection to a user's primary wallet address is obscured

Users fund Starknet Shadow Accounts by depositing supported assets into a shared privacy pool represented through encrypted STRK20 balances.

OpenZeppelin audited OffMarket's privacy pool contract in June 2026 without high-severity findings, and StarkWare formally verified the contract in July 2026.

OffMarket limits account deposits to $1,000 USDC in its open-source privacy pool, which holds around $1.5 million and 17,000 deposits as recorded by L2BEAT.

Starknet already utilizes hash-based STARK proofs and native account abstraction, enabling accounts to adopt post-quantum signatures without requiring a protocol upgrade

As an Ethereum layer 2, Starknet bundles transactions and relies on the underlying Ethereum base layer for security validation

Starknet's cryptographic proofs rely on hash functions, which are considered essential quantum-resistant building blocks, though Starknet outlined plans on June 30, 2026 to replace remaining elliptic-curve components

The Ethereum Economic Zone's demonstration transaction moved 0.001 Ether, worth approximately $2.70, and updated a rollup state in a single all-or-nothing operation confirmed in block 26,127,444 for a fee of about $0.80.

The Ethereum Economic Zone framework utilizes Zisk's zero-knowledge proving technology, uses Ether as its default gas token, and does not introduce a new native token.

The Ethereum Economic Zone's core software is in an early-stage, unaudited phase, with full bidirectional composability, nested cross-chain calls, and real-time zero-knowledge proving on the roadmap through 2027.