Private transfers
MIST verifies that a transfer is funded, authorized, and balanced without publishing the underlying payment details.
Partners can move value between private balances without exposing their full payment position on-chain.
Protocol
Privacy infrastructure by your rules.
MIST gives payment protocols a private way to move assets across networks. Partners can set their own transaction rules and provide evidence to authorized reviewers without putting sensitive details on a public ledger.
- USDC
- via CCTP networks
- ~1s
- privacy check on a phone
- <2¢
- target cost per transfer
- ZK
- privacy by mathematics
Protocol showcase
Built for protocols.
MIST is infrastructure first. Operators and integrators compose these capabilities into their own products.
Your rules, in the payment flow
Operators can add limits, approval requirements, and release conditions to transfers and withdrawals.
Your policy stays part of the transaction rather than becoming a manual review after the fact.
Compliance with controlled disclosure
A transaction can carry evidence of KYC status, jurisdiction, audit approval, or amount limits without publishing the underlying record.
Authorized reviewers can receive the evidence for a specific transaction instead of getting unrestricted access to the whole flow.
Clear asset boundaries
Each transfer accounts for one asset within one Chamber and Reserve combination.
Funds governed by different policies remain separated, making ownership and compliance responsibilities easier to define.
Built for integration
Withdrawals can carry instructions for the receiving contract, with the transaction binding those instructions before settlement.
Partners can connect private payments to their existing products without giving a relayer room to change the requested action.
Architecture
A private record, your controls, separate funds.
MIST separates the payment record from partner controls and asset custody. Chamber tracks ownership; Middleware applies business rules; Reserves hold funds under a defined policy.
Chamber
Payment record
Chamber keeps the private record of who owns what and confirms that each payment follows the protocol rules. It never holds the funds.
Middleware
Partner controls
Middleware is where a partner adds business rules such as limits, approvals, eligibility checks, and release conditions.
Reserve
Separate funds and policies
A Reserve holds the assets and applies one defined set of entry, payment, and withdrawal requirements.
When funds enter MIST, the Chamber records the private balance and a Reserve holds the assets. Internal payments update private balances without moving funds on-chain. When funds leave, the Chamber checks the payment and the Reserve sends them to the stated destination.
Each payment uses one asset and one Reserve policy. Hidemi currently supports USDC across CCTP networks. Broader cross-network movement is a separate product layer, and USDT via usdt0 is planned.
What is measured
Evidence, not adjectives.
Benchmarks and milestones that show what the system can do.
First privacy proof
Produced on Starknet in July 2024, via a Garaga implementation.
~1s
Measured privacy-check generation on an iPhone; a benchmark, not a guarantee for every deployment.
~5¢
Current product cost benchmark, heading toward a <2¢ target.
One combined check
MIST can combine payment validity and partner rules into one check for settlement, with the final proving work handled by the selected deployment model.
USDC via CCTP
Current product scope is cross-network USDC over CCTP-supported networks; each payment still uses one asset and one Reserve policy.
Controlled disclosure
A reviewer can receive evidence for a specific transaction without receiving unrestricted access to the full payment flow.
Benchmarks, targets, current product scope, and planned capabilities are labeled separately so partners can tell what is available today.
Why MIST
The white space is the intersection.
Cross-network USDC, clear policy boundaries, and partner-defined compliance. MIST combines these priorities without hiding the operational trade-offs.
| Capability | MIST | Privacy pools | Privacy coins | On-chain privacy proofs | FHE |
|---|---|---|---|---|---|
| Cross-chain | |||||
| Single-asset transaction accounting | Unspecified | Unspecified | Unspecified | Unspecified | |
| Native programmable compliance | |||||
| Settlement finality | |||||
| Who can be grouped together | Shared private payments; separate policy pools | Variable | Global | Variable | Variable |
Trade-offs are real. MIST keeps each payment tied to one asset and one policy pool, while cross-network movement is handled separately. The important question for a partner is who can review what, under which policy, and at what point in the payment flow.
Blog
Latest from the protocol.
Signal
In the wild.
Independent takes on the protocol, from the people building in the space.
Congrats @shrameetweets! In addition having a cool UX it also employs very nice SNARK optimizations.
Try Hidemi: hidemi.mist.cash → Generate a private payment link → Receive funds anonymously → Spend without linking back
I haven’t met a builder yet with as innovative and workable an approach to private payments as @shrameetweets has with @_mistcash Worth checking out
Try Hidemi: hidemi.mist.cash → Generate a private payment link → Receive funds anonymously → Spend without linking back
The need for a layer of privacy in some use cases is unlocking adoption and solving the core problems of transactions that need privacy. Check out @_mistcash last release of the app and have privacy on chain! Proud to have this amazing team on our CH4 @FS_Build
Try Hidemi: hidemi.mist.cash → Generate a private payment link → Receive funds anonymously → Spend without linking back
got something that you need some crazy optimisations, call @shrameetweets
New 🔥 4.3x faster 🔥 Poseidon implementation in Cairo! Old impl: 2,017,424 gas New impl: 475,930 gas Sweet leap towards faster and cheaper ZK proofs on MIST.cash 💵
real life privacy payment on starknet via mist cash protocol, today, on mainnet. private p2p cash gud. starknet will soon be the post quantum scalable and private layer
Talking about MIST, we say we always are building the privacy payments that you can use to pay for your coffee. The vision "solidified" at @StarknetFndn @StarkWareLtd StarkConnect, when we sold coffee grounds/beans fully privately with MIST. ❤️ @CofiBlocks ❤️ @jonatanChaverri ❤️
This is proof that you can integrate privacy into your app in less than 24 hours with Mist Cash 🔥 thanks bro @shrameetweets
No better way to understand what @shrameetweets has been working on with @_mistcash that this integration with @CofiBlocks that literally happened overnight. Coffee bean producers are now safer thanks to private payments
Talking about MIST, we say we always are building the privacy payments that you can use to pay for your coffee. The vision "solidified" at @StarknetFndn @StarkWareLtd StarkConnect, when we sold coffee grounds/beans fully privately with MIST. ❤️ @CofiBlocks ❤️ @jonatanChaverri ❤️
Speaking
In the field.
The protocol is shaped in public: explaining the systems, proving the trade-offs, and building privacy infrastructure that can be examined.
Build with MIST.
Integrate private settlement into any protocol. The docs specify the full operator and integrator path.