StarkWare has announced STRK20, a token framework designed to embed transaction privacy directly into ERC-20 assets on Starknet (STRK).
The system hides sender, receiver, token type, and transfer amount by default - without relying on mixers or external wrappers.
Deployment on Starknet mainnet is targeted for later this year.
The framework is built on Starknet's native zero-knowledge architecture. Every private transaction is proved client-side and verified at the sequencer level using the same infrastructure Starknet already uses to prove its own blocks.
All logic is written in Cairo, eliminating the need for a separate circuit language or parallel proving infrastructure.
What STRK20 Does
At the center of the system is the Starknet Privacy Pool - a single shared pool that supports every ERC-20 on the network.
Users deposit, transact, and withdraw within the pool. Each transaction is backed by a ZK proof, confirming validity without exposing any underlying data to outside observers.
Transactions are expected to settle in under five seconds and cost less than $0.20 - performance benchmarks the team says are intended to make privacy practical for financial applications, not just technically possible.
The system launches with two live integrations: anonymous swaps on Ekubo DEX and anonymous staking. In both flows, users interact directly from the privacy pool, with no address linked to the trade or the staking position.
Why It Matters for Institutions
The transparency of public blockchains is a structural barrier for institutional and enterprise adoption. Supply chain payments, treasury management, and trading activity all become public record the moment they touch a blockchain - incompatible with how most financial entities operate.
Eli Ben-Sasson, CEO of StarkWare and co-founder of Zcash (ZEC), said the capability could help accelerate institutional adoption of stablecoins "up about five gears."
STRK20 is also expected to underpin strkBTC, a bitcoin-based asset Starknet unveiled as part of its broader BTCFi push.
The Compliance Mechanism
STRK20 includes a scoped audit path. When a user joins the privacy pool, they register an encrypted viewing key on-chain.
Upon a regulatory request, a designated third-party auditor can decrypt that specific user's key and reconstruct their full transaction history - without touching any other user's data.
The mechanism is designed to answer a persistent question in privacy-focused crypto: whether a compliance path can be built into the protocol layer rather than retrofitted afterward. Whether institutions treat that answer as sufficient remains to be seen.
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