Starknet is rolling out a privacy-focused wrapped Bitcoin token that aims to bring Zcash-style confidentiality to Ethereum’s layer-2 ecosystem.
What’s launching
- The token, called strkBTC, was unveiled by Starknet Foundation and StarkWare on Feb. 26, 2026. It’s a wrapped Bitcoin on Starknet with built-in privacy controls that let users hide balances and make confidential transfers while remaining interoperable with DeFi apps on the network.
- Starknet promoted the project on Twitter, calling it “Bitcoin to get privacy” and inviting users to “shield your Bitcoin balances and transfers, or don’t.”
How privacy works
- strkBTC uses zero-knowledge cryptography—similar in concept to Zcash—to prove the validity of transactions without exposing underlying data. That enables both public and private addresses, giving users and institutions flexibility for compliance.
- The token will be auditable via a viewing key and “other mechanisms designed to be risk management compatible,” according to the press release shared with Decrypt. In practice, that means privacy is configurable: users can conceal information by default but still provide access for regulatory or forensic needs if required.
People behind it
- The design echoes Zcash’s approach in part because Eli Ben-Sasson, StarkWare co-founder and Starknet Foundation board member, was involved in the early development of Zcash’s privacy primitives. “Privacy is a fundamental requirement for market participation,” he said, arguing zero-knowledge cryptography keeps markets open while keeping participants confidential.
Bridging Bitcoin to Starknet
- Access to strkBTC will be available through a bridge powered by Atomiq Labs. Rather than relying on centralized custodial wrapping, Atomiq says it uses atomic swaps—cryptographic mechanisms that ensure either the exchange completes or funds are returned—to reduce third-party custody risk.
- StarkWare’s general counsel, Katherine Kirkpatrick Bos, said the team aims to “mitigate the use of third-parties” and make the wrapper resilient. She also confirmed that a third party will hold the viewing key so there’s a mechanism to respond to regulatory inquiries.
Design and use cases
- Starknet emphasizes that privacy lives at the protocol/infrastructure level for strkBTC, not as an add-on in wallets or off-chain tools. The token is intended to behave like a regular wrapped Bitcoin across the network’s DeFi stack, including the ability to stake for network rewards.
Context for Starknet and Bitcoin
- The move follows Starknet’s recent push to integrate Bitcoin more deeply into its stack. In September, the network started allowing users to stake Bitcoin-based assets to shore up security, paying rewards in STRK.
- Starknet has faced operational issues recently: a block problem last month caused more than four hours of downtime and marked the second outage in a few months.
Market snapshot
- STRK has struggled on the market: CoinGecko showed the token trading around $0.042 on Thursday, down roughly 80% over the past year and slightly above an all-time low of $0.039 recorded earlier in the week.
Why it matters
- strkBTC represents a notable experiment in making Bitcoin’s liquidity more private and programmable on an Ethereum L2 while attempting to balance regulatory auditability. If successful, it could broaden on-chain privacy options for Bitcoin holders engaging with DeFi—though reliance on viewing keys and third-party procedures will shape how regulators and institutions respond.
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