Privacy finally found the right frequency. [STRK20] is live on Starknet. 🧵

Shield any asset from public view. Privacy you control, on Starknet.

Private swaps are live on Starknet. Here’s how to swap privately:

STRK20 is live. The next step is what gets built. Proof of Privacy is the Starknet Foundation incubator for teams using [STRK20] to build private applications. Payments, trading, identity, games, new financial products and more. Apply here 🔽

Everything you need to start using STRK20 is in one place. Shield assets, explore live apps, discover private DeFi, track adoption, and see what can be built. Get started below 👇

Over the coming weeks, STRK20 will expand across the Starknet ecosystem. • Broader app integrations • Open-source SDK access • Proof of Privacy incubator launch • Private swaps through avnu and Ekubo • More private DeFi flows, including yield, staking, and lending.

How does STRK20 actually work? STRK20 uses a note-based privacy pool. Shielded ERC-20s are deposited into the pool and represented as encrypted notes. Private actions consume existing notes and create new ones. Zero-knowledge proofs verify validity, balance conservation, and double-spend protection before Starknet updates the pool state. Proofs are generated with Stwo, while Cairo is used across the proof logic and contract code. Encrypted notes are stored directly in Starknet contract storage. Observers see encrypted notes and required protocol metadata, not the sender, receiver, amount, or private balances used. Technical paper linked for a deeper dive:

For privacy to become part of normal onchain use, it has to be practical and scalable. On Starknet, private transactions cost 4 $STRK with no variable pricing based on transaction size. That makes shielded activity cost-effective and predictable.

STRK20 is a framework for builders. Privacy does not need to be the product. It can be what makes the product better. Games where your cards stay hidden. Trading where your strategy is not exposed. Lending where you can borrow without revealing a move.

Privacy is a spectrum, and on Starknet it can extend across the ecosystem. • Wallets • Gaming • Infrastructure • Prediction markets • Trading and liquidity • Payroll and payments • Lending and borrowing • and many other corners

Privacy starts in the wallet. Using @ready__x or @xverse, users can select an asset and shield it in one click. That unlocks what is live today: • Private transfers • Shielded balances • One-click shielding unshielding • Private swaps through Ready Xverse

STRK20 is Starknet’s privacy framework for ERC-20 assets. It gives assets and applications on Starknet access to private flows, starting with shielded balances, private transfers and swaps. Privacy is now a capability the ecosystem can access, integrate, and build with.

Privacy shouldn’t mean new assets, new wallets, or new applications. What if it worked where you already use crypto? June 9, privacy comes to [Starknet]

Shielded mode on.