Decentralized privacy solutions provider Fairblock has launched CUSD, a privacy-focused stablecoin built on PYUSD and powered by M0, PayPal, MoonPay, and Predicate. Stablecoins are tokens pegged to fiat currencies such as the U.S. dollar, and PYUSDx builds on PYUSD, the dollar stablecoin PayPal introduced in 2023. The asset is initially deployed on Arbitrum, an Ethereum layer-2 network, in what the company describes as the first confidential stablecoin to go live.

Announcing the launch in a post on X on September 30, 2026, Fairblock said CUSD allows users to "move money onchain without broadcasting every balance and payment amount."

"The first confidential stablecoin is live. Introducing CUSD, built on PYUSDx by @m0, @PayPal and @moonpay, and @0xPredicate. Move money onchain without broadcasting every balance and payment amount. live on @arbitrum to begin with."

— Fairblock (@0xfairblock) on X, September 30, 2026

One Asset, Both Public and Private Transfers

CUSD is designed to support both public and private transfers. Users can conduct transparent transactions when openness is needed, or encrypt payment amounts and account balances when confidentiality is required. According to Fairblock, this flexibility addresses a persistent limitation of stablecoins and tokenized assets: although such instruments are increasingly used for payments, treasury operations, and trading, their balances and transaction amounts have historically been exposed publicly on-chain—a trait often credited with enabling open auditability, but one that leaves little room for financial privacy.

The product targets two distinct audiences. Institutions can use CUSD to protect sensitive financial information, including payroll, treasury management, and over-the-counter settlement data. Individual users, meanwhile, can keep payment amounts and transaction flows confidential while operating within familiar on-chain infrastructure.

Fairblock said it will encourage adoption and expand the use of privacy features through economic incentives, with further details to be announced at a later stage. The company also emphasized ease of access: no bridging and no wallet switch are required, and users can purchase CUSD through an integration with Privy.

Compliance Paired With Verifiable Controls

Fairblock has stressed that confidentiality in CUSD is paired with verifiable controls rather than anonymity. The stablecoin incorporates four compliance layers—screening, containment, issuer controls, and selective disclosure—developed with Predicate specifically for institutional use. That framing carries weight in a sector where privacy tools that provide anonymity without compliance features have historically drawn regulatory enforcement, making the divide between confidentiality and anonymity a central design question for on-chain finance. The architecture reflects the company's broader positioning: a middle path between full public exposure and isolated anonymity systems, in which sensitive values remain confidential while applications retain address-level controls, monitoring, and partner-specific compliance policies.

On-Chain Cryptography and Non-Custodial Design

On the technical side, CUSD has been audited by Nethermind. Fairblock highlighted that the design requires no trusted execution environment or off-chain coprocessor, and that no threshold committee controls user funds. Cryptographic operations run entirely on-chain, with assets held in non-custodial smart contracts. The system uses fast homomorphic encryption—a cryptographic technique that allows computation on encrypted data without decrypting it first—to enable confidential transfers that settle in seconds rather than minutes.

Fairblock positions CUSD within its wider focus on programmable confidentiality for stablecoins, tokenized assets, transactions, and intelligent applications. According to the company, the same infrastructure could eventually support AI inference, agentic workflows, and intelligent systems that handle sensitive enterprise and financial data.

If adoption develops as planned, CUSD could extend the debate around on-chain privacy from individual users to the institutional finance segment, where confidentiality over balances, payroll, and trading flows has long been a barrier to deploying public blockchain infrastructure for serious commercial activity. Near-term signposts to watch include the promised details on Fairblock's incentive program and whether the "to begin with" rollout on Arbitrum extends to additional networks.

This article was first published by Metaverse Post.