Circle has introduced Arc Privacy, a new system designed to bring confidential execution to its Arc blockchain. The company announced the development on June 10, positioning it as a response to a longstanding issue in blockchain infrastructure: the default public visibility of transaction data and smart contract states.
Public blockchains established a foundation for programmable finance, auditability, and composability. However, that same transparency has limited adoption among financial institutions and enterprises that manage sensitive operational data. Payroll details, treasury movements, and trading strategies often become visible onchain, which creates barriers for real-world financial workflows.
Arc Privacy introduces an opt-in model that allows developers and businesses to decide when transaction details should remain confidential. Instead of exposing all activity by default, the system enables selective disclosure, with access granted only to authorized parties when required.
Previewing Arc’s future approach to opt-in privacy.
— Arc (@arc) June 10, 2026
Sensitive financial workflows should not become public market data.
Arc’s privacy whitepaper outlines a roadmap for future confidentiality features with governed visibility for authorized parties.
Potential use cases include:… pic.twitter.com/xQ0e5GCwQe
Opt-in confidentiality with governed access
According to Circle, Arc Privacy processes transactions without exposing sensitive information to the public chain. It preserves structured access for compliance teams, auditors, and internal stakeholders.
The design removes the need for a single entity to hold full visibility over private data. Instead, it introduces controlled access rules that align with governance, risk management, and regulatory expectations.
This approach reflects a shift in how blockchain privacy evolves. Fully opaque systems have struggled to meet compliance standards, while fully transparent systems expose too much information. Arc Privacy aims to balance both by enabling confidentiality without removing auditability.
Jeremy Allaire, cofounder of Circle, confirmed the strategic direction in a public statement:
"Today we published the detailed design for Arc’s upcoming privacy infrastructure. It is a major step forward in building the Internet financial system in a way that works for people, households, major, corporations, and financial institutions."
Built for composability and existing workflows
Arc Privacy does not isolate applications from the broader blockchain ecosystem. Instead, it supports composability, which allows private smart contracts to interact with other onchain components.
Developers can integrate confidentiality into existing applications without rebuilding architecture from scratch. The system also supports reuse of private smart contract logic across multiple workflows.
Arc itself launched as a public blockchain focused on institutional finance. It supports EVM compatibility and uses USDC as its native gas token. Additional features include sub-second finality and a quantum-resistant design.
Existing blockchains face a massive coordination problem migrating to post-quantum cryptography.@jerallaire says Arc is being built with post-quantum signatures from day one. pic.twitter.com/vtEnJ0vaFe
— Circle (@circle) June 10, 2026
Circle expanded its institutional strategy in May, when it raised $222 million through a presale of the ARC token. The funding round assigned the network a fully diluted valuation of $3 billion. Backers included Andreessen Horowitz, BlackRock, Apollo Funds, ARK Invest, Haun Ventures, Intercontinental Exchange, and Standard Chartered Ventures.
Enterprise use cases take priority
Circle outlined several use cases where privacy remains essential for onchain adoption.
Payroll operations stand out as a primary example. Organizations can execute global payouts without exposing compensation data, recipients, or treasury flows. At the same time, internal audit teams retain access when required.
Treasury management represents another area. Companies can move funds and manage balances without revealing counterparties or operational strategies to the public market.
Trading workflows also benefit from confidentiality. The system allows participants to protect positions and execution intent, which reduces risks tied to visibility. Tokenized asset issuance and management gain similar protections, especially around allocation data and holder activity.
Lending markets also emerge as a target use case. Borrowers and lenders can interact without exposing collateral positions or credit activity, while still operating within multi-step application flows.
Consumer payments form part of the framework as well. Users can transact with USDC without making wallet balances and payment histories publicly traceable. Authorized entities can still access records for compliance reviews when necessary.
Institutional adoption shapes Arc roadmap
More than 100 organizations have participated in Arc’s testnet program, according to Circle. Participants include State Street, Deutsche Bank, BlackRock, Goldman Sachs, and Visa.
The company positions privacy as a prerequisite for broader institutional adoption. Many financial entities cannot operate in environments where sensitive data becomes public by default. Arc Privacy aims to remove that constraint while maintaining governance and oversight.
The system reflects a broader transition in blockchain infrastructure. Early networks prioritized transparency as a core principle. New designs now introduce selective confidentiality to support enterprise requirements.
Arc Privacy represents Circle’s attempt to define that middle ground. It introduces confidentiality as a configurable feature rather than a fixed rule. For institutions that require both privacy and accountability, that model could determine whether blockchain moves from experimentation to production use.
Gunel Ismayilova
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