Privacy With Control: How Arc Can Unlock Onchain Finance
Summary
Arc Privacy, Arc’s confidential smart contract engine, brings opt-in private transactions and private smart contracts to Arc. It helps enterprises and builders protect sensitive workflows such as payroll, treasury, trading, and asset issuance while preserving governed access for authorized parties.
Public blockchains helped make finance programmable, composable, and auditable. That transparency is both useful and powerful. But for many financial services companies and businesses, the radical transparency blockchains enable can expose sensitive information that shouldn’t be in the public domain.
Most blockchains expose transaction data and smart contract states by default. That openness has fostered a dynamic onchain financial ecosystem, but it also makes many real-world workflows difficult to move onchain. In addition, regulated entities cannot adopt privacy that functions like a black box. Compliance, risk, finance, and audit teams need a clear model for who can see what, when, and under what authority.
A company’s payroll should not be market data. Treasury movements should not reveal counterparties, balances, or strategies. A trading workflow should not broadcast intent before execution. Yet these are exactly the kinds of workflows that can benefit from blockchain infrastructure: faster settlement, programmable controls, shared records, lower operational friction, and more efficient global coordination. For banks, fintechs, treasury platforms, asset issuers, and many other businesses exploring onchain solutions, privacy is what makes those benefits usable in real-world financial operations.
The next phase of onchain finance needs a more disciplined and flexible privacy model. Confidentiality that protects sensitive activity when needed, while preserving governance, auditability, and authorized access. That is the role of Arc Privacy, Arc’s confidential smart contract engine, an opt-in system that processes transactions without exposing sensitive details to the public chain.
Previewing future confidential execution on Arc
Arc’s future privacy features are opt-in, so teams can decide exactly when confidentiality belongs in a workflow rather than broadcasting all transaction data publicly or forcing everything into a private mode. That makes it possible to bring sensitive operations onchain while still building in a familiar EVM environment and keeping the rest of an application’s logic and integrations intact.
Under the hood, Arc is designed to keep sensitive transaction details protected during execution and to support controlled access when private data needs to be reviewed. In practice, that means privacy doesn’t require trusting a single party with full visibility, and it can be paired with clear authorized rules when required for audit, compliance, or internal controls.
The outcome is composable privacy where private contracts can interact as part of broader application flows rather than operating in isolated environments. Developers can reuse existing private smart contract logic to build multi-step private applications, instead of starting from scratch. Builders can add confidentiality to production workflows without reworking their architecture. And, enterprises can operate onchain without exposing sensitive activity.
What privacy on Arc enables
Arc’s privacy features are built for legitimate financial workflows where confidentiality is a requirement. It lets teams keep sensitive activity out of public view while still maintaining clear, governed access for the people who need visibility to operate responsibly.
The composability of Arc’s privacy features enables institutions to run workflows like payroll, treasury operations, B2B settlement, and trading without turning balances, counterparties, or internal strategy into public market data. The same protections extend to consumers, who can use USDC without making their balances and everyday payment activity publicly traceable. Privacy also remains compatible with oversight: authorized parties such as compliance teams and approved auditors can be granted the access they need for records, reviews, and investigations.
This type of selective-use privacy makes onchain finance more approachable. It protects sensitive data without breaking governance expectations, making it easier for institutions and builders to deploy real onchain applications that may help support internal risk review processes and operate at scale.
What Arc’s privacy features unlock
Arc’s privacy features unlock a set of onchain use cases that haven’t been practical on many public-by-default blockchains.
- Payroll: Run bulk payouts globally and in near-real time without exposing compensation amounts, recipients, or treasury outflows publicly while retaining audit-ready access.
- Treasury operations: Move funds at high speeds and low costs and manage balances without broadcasting counterparties or operational patterns to the market, with controlled disclosure for approvals and audit.
- Tokenized asset management: Issue and manage tokenized assets while protecting holder activity, allocations, and sensitive flows.
- Perps and trading workflows: Reduce transparency-driven targeting by keeping sensitive trading activity and positions confidential where needed, while maintaining a governance-friendly posture.
- Borrow and lending: Enable borrowers and lenders to participate in onchain credit markets without publicly exposing positions, collateral activity, or key lifecycle actions, while preserving the multi-step application flows these products require.
Together, these workflows show how opt-in confidentiality turns onchain finance from “transparent by default” into infrastructure that institutions and products can deploy on Arc.
The standard for real-world onchain finance
As more financial activity moves onchain, privacy increasingly becomes a prerequisite. Public transparency remains valuable, but many businesses cannot treat employee data, customer activity, trading strategy, and counterparty relationships as public goods.
Arc’s composable, opt-in privacy features give enterprises and builders a practical way to protect sensitive activity, keep workflows composable, and maintain governance and oversight while unlocking new use cases and new value onchain.
The result is a practical path to production for enterprises and builders who can’t operate on transparent-by-default rails.
To dive deeper and learn more, read the whitepaper.
Arc testnet is offered by Circle Technology Services, LLC ("CTS"). CTS is a software provider and does not provide regulated financial or advisory services. You are solely responsible for services you provide to users, including obtaining any necessary licenses or approvals and otherwise complying with applicable laws.
Arc has not been reviewed or approved by the New York State Department of Financial Services.
The product features described in these materials are for informational purposes only. All product features may be modified, delayed, or cancelled without prior notice, at any time and at the sole discretion of Circle Technology Services, LLC. Nothing herein constitutes a commitment, warranty, guarantee or investment advice.
USDC is issued by regulated affiliates of Circle. See Circle’s list of regulatory authorizations.
Arc’s privacy features reflect a proposed design that includes selective shielding of certain onchain data elements. The scope, functionality, and rollout timeline of the Arc privacy features are subject to change and may be modified, delayed, limited, or discontinued at any time in the sole discretion of Arc Network Services LLC. See arc.io/privacy-whitepaper for more.