Fhenix launches encrypted smart contract computation on Ethereum and Arbitrum

What happened

Fhenix has moved its confidential computing stack into production on Ethereum and Arbitrum, enabling smart contracts to carry out operations on encrypted information without the underlying data becoming visible onchain. The company said on Oct. 21, 2026 that the deployment coincides with the production release of CoFHE, the fully homomorphic encryption (FHE) coprocessor that powers the system. Crypto.news and Blockonomi both reported the launch.

CoFHE performs the computationally heavy encrypted work away from the chain and returns the results to contracts on the two networks. According to Fhenix, throughput adjusts to demand rather than being capped at a preset processing rate. For builders, the company has tried to keep integration familiar: confidentiality is added through a Solidity import and encrypted data types that are intended to behave much like ordinary variables, so existing smart contract workflows carry over.

The launch also introduces a dual-mode token architecture. Holders can move a balance between public and confidential modes within a single transaction, without wrapping the asset or sending it through a bridge. Because the token stays on its original blockchain, Fhenix says the design remains compatible with existing wallets, exchanges and decentralized finance protocols.

Two design partners went live alongside the network. Fluton is building a confidentiality engine that uses encrypted intents for activity spanning blockchains, applications and assets, while Alpha Engine is developing a confidential venue for onchain finance where strategists can submit encrypted strategies and compete for liquidity without disclosing their approaches. Fhenix said both completed technical and security reviews, and that Consensys Diligence audited the system before launch.

Why it matters

Public blockchains expose transactions and contract activity to anyone, which has made them awkward for financial services that depend on private information. Fhenix is positioning CoFHE as base-layer infrastructure for confidential DeFi and tokenization, pointing to a tokenization market it values at a potential $1.5 trillion that it says privacy constraints have held back. Steven Goldfeder, co-founder and CEO of Offchain, framed the problem as a trade-off institutions have long faced. "Confidentiality is one of the biggest barriers between institutions and public blockchains," he said, adding that keeping positions and strategies private previously meant surrendering the composability that makes onchain markets useful. The Arbitrum deployment, in his view, lets developers pursue both within the same ecosystem.

What the data shows

The announcement, dated Oct. 21, 2026, covers two networks, Ethereum and Arbitrum, and two design partners going live at launch. Fhenix cites a $1.5 trillion tokenization opportunity as the market its privacy tooling targets. On the roadmap, three more decentralized applications are scheduled to deploy on CoFHE during the fourth quarter of 2026, and the company expects to announce two institutional partnerships in the coming weeks. Consensys Diligence conducted the pre-launch audit.

Background

Fhenix has spent roughly three years developing the technology. Founder Guy Zyskind said the company's early ambitions fell short of where the project has arrived. "CoFHE is now live on Ethereum and Arbitrum mainnet, with competitive performance and a UX that's simple for any builder who wants privacy in their dApp," he said. The launch is the company's attempt to make general-purpose public chains viable for applications that cannot operate with fully visible state. Fhenix also said it is working with Tandem on a confidential stablecoin, though the announcement gave no details on development status or timing.

What to watch

Several items remain open. Fhenix has not published throughput or latency benchmarks beyond describing performance as competitive, so independent measurements of CoFHE under real load are still to come. The Tandem stablecoin project has no disclosed timeline. The announcement also did not name the Consensys Diligence representative quoted on the extra security considerations that arise when contracts operate on data they cannot read. Beyond Ethereum-compatible chains, Fhenix is taking part in the Colosseum hackathon to gauge demand for confidential applications on Solana, a possible extension of the technology to a non-EVM network.

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