Circle has unveiled Arc Privacy, a confidential smart contract engine that delivers 2,800 TPS public throughput while maintaining 1,070 TPS for private transfers in the same block. According to the latest technical specifications, the system operates on EVM environments with a proposed design featuring synchronous execution where public and private state finalize together in the same consensus round. The privacy system supports EVM based applications and allows developers to build multi-step confidential workflows without redesigning existing blockchain infrastructure. As per the company's June 10 announcement, this new system addresses one of the biggest obstacles facing institutional blockchain adoption - the public visibility of transaction data and smart contract activity on most networks. The company has now released a privacy white paper to accompany the launch, providing detailed technical specifications for the confidential smart contract engine.
Circle highlighted several enterprise-focused applications as potential beneficiaries of the privacy engine. Organizations could execute payroll payments across multiple jurisdictions without publicly revealing compensation details, recipient information, or treasury outflows. Treasury management operations could be conducted without exposing counterparties, account balances, or operational strategies to the market. Tokenized asset issuers would be able to protect allocation data and holder activity, while derivatives traders could keep positions and trading activity confidential to reduce transparency-driven targeting. The latest whitepaper identifies specific workflows including private salary disbursement, treasury fund transfers, tokenized asset management, confidential perpetual contract trading, and private lending. The engine emphasizes composability, allowing developers to build multi-step private application workflows within the Ethereum ecosystem.
Under the Arc Privacy architecture, no single validator holds the keys - the master secret is split across validators and only reconstructed inside an attested enclave at a threshold tied to Arc's BFT safety bound. The system uses hybrid post-quantum encryption combining classical and post-quantum cryptography to protect against harvest-now-decrypt-later attacks. Privacy remains optional rather than mandatory, with businesses deciding which parts of a workflow require confidentiality while leaving other functions visible. The proposed design includes three query models: unauthenticated plaintext queries for public-safe reads, encrypted queries that protect requests on the wire while maintaining caller anonymity, and authorized queries where callers prove identity through EIP-712 signatures. Unlike privacy systems that isolate applications from the rest of the blockchain ecosystem, Arc Privacy is being developed to support composability - developers will be able to combine private smart contracts into larger application flows and reuse existing contract logic across multiple products.
The announcement builds on Arc's institutional blockchain strategy introduced in May, when Circle raised ₹1,800 crore ($222 million) through a presale of the ARC token and assigned the network a fully diluted valuation of ₹15,000 crore ($3 billion). Backers of the fundraising round included Andreessen Horowitz, BlackRock, Apollo Funds, ARK Invest, Haun Ventures, Intercontinental Exchange, and Standard Chartered Ventures. More than 100 organizations, including State Street, Deutsche Bank, BlackRock, Goldman Sachs, and Visa, have previously participated in Arc's testnet program, according to Circle. This token launch signifies a step forward in institutional adoption of blockchain finance, as reported by ME News.
Consumer payments form another part of the proposal under the framework outlined by Circle. Users could transact with USDC without making wallet balances and payment histories publicly traceable, while approved auditors and compliance teams would still be able to access records when necessary. Circle has positioned privacy as a key requirement for bringing more financial activity onchain as it prepares the network for broader institutional use. The blockchain uses USDC as its native gas token and was introduced with features including sub-second finality, EVM compatibility, opt-in privacy, and quantum-resistant architecture. The latest whitepaper emphasizes that everything onchain is visible to everyone, forever - a feature that enables strangers to trust a ledger without trusting intermediaries, but also creates a ceiling for financial workflows that were never meant to run as public data feeds.
