Fhenix Launches CoFHE Mainnet on Ethereum and Arbitrum for Encrypted Smart Contract Computation
Fhenix launched its fully homomorphic encryption coprocessor on Ethereum and Arbitrum mainnets, enabling smart contracts to compute on encrypted data while enforcing rules onchain.
Why it matters
The launch brings fully homomorphic encryption to Ethereum and Arbitrum mainnets for the first time, allowing institutional participants to execute DeFi strategies without broadcasting sensitive data to public ledgers. This addresses a key barrier to institutional adoption of public blockchains.
Key facts
Fhenix launched its CoFHE mainnet on Ethereum and Arbitrum
Reported by Unchained
The CoFHE coprocessor uses fully homomorphic encryption to compute on encrypted data off-chain and pass results back to on-chain contracts
Reported by Unchained
Fhenix introduced dual-mode tokens that carry a confidential mode alongside their public mode, allowing holders to shift balances into confidential mode in one transaction
Reported by Unchained
Offchain Labs CEO Steven Goldfeder said confidentiality is one of the biggest barriers between institutions and public blockchains and that CoFHE solves institutional privacy needs in DeFi
Reported by Bitcoin.com News
Fhenix plans to deploy three decentralized applications in Q4 and expand confidential applications to Solana via hackathons
Reported by Bitcoin.com News
The launch occurred on October 21
Reported by Bitcoin.com News
What happened
Fhenix announced Wednesday that its CoFHE coprocessor, built on fully homomorphic encryption, is now in production on Ethereum and Arbitrum mainnets. The technology allows smart contracts to execute computations on encrypted balances, positions, and trading strategies without decrypting data onchain, while still enforcing contract rules. Offchain Labs CEO Steven Goldfeder said CoFHE addresses institutional privacy needs in DeFi. Fhenix also introduced dual-mode tokens that can shift between confidential and public modes in a single transaction without leaving their home chain or requiring wrapping. The company plans to deploy three decentralized applications in Q4 and expand confidential applications to Solana through hackathons.
How the story developed
- First report
First report by Unchained
Fhenix Goes Live on Ethereum and Arbitrum, Letting Contracts Compute on Hidden Balances
- Update
Fhenix launches CoFHE mainnet on Ethereum and Arbitrum
Fhenix announced its fully homomorphic encryption coprocessor is now in production on both networks
- Official statement
Official statement from Bitcoin.com News
Ethereum and Arbitrum Gain New Privacy Layer as Fhenix Goes Live
- Update
Bitcoin.com News reports on Fhenix mainnet launch with additional details
Coverage includes Offchain Labs CEO Steven Goldfeder comments and Fhenix plans for Q4 dApp deployment and Solana expansion
How coverage built up
Independent sources over time, counted the way the consensus panel counts them: a republication of a wire story does not move the line.
- 21 Oct 2026, 13:00 UTC: Unchained — 1 independent source, 1 reports
- 21 Oct 2026, 20:30 UTC: Bitcoin.com News, official — 2 independent sources, 2 reports
- 22 Oct 2026, 12:00 UTC: Bitcoinist — 3 independent sources, 3 reports
Affected entities
Original sources
| Publisher | Report | Role | Published |
|---|---|---|---|
| Bitcoin.com News Company, official | Ethereum and Arbitrum Gain New Privacy Layer as Fhenix Goes Live | Independent | |
| Unchained Crypto media | Fhenix Goes Live on Ethereum and Arbitrum, Letting Contracts Compute on Hidden Balances | Original | |
| Bitcoinist Crypto media | Fhenix Brings Encrypted Smart Contract Computing To Ethereum And Arbitrum | Independent |
Related events
Bitget Says Stolen Funds Are Covered by Its Hedging Fund After Reported Hack
CryptoNews.net reported on-chain movement of assets from wallets labelled as Bitget's, including one address that bought 7,111 ETH, with total funds affected estimated above $170 million.
Binance cuts collateral ratios on six tokens as Coinbase drops 29 assets from eligible collateral
Binance cut collateral ratios on AUCTION, BLUR, GALA, HYPER, S and SYRUP to 10%, and Coinbase International Exchange will drop 29 assets from its eligible-collateral list on Sept. 29.
Robinhood Chain daily fees fell 97% from peak even as transaction counts stayed near highs
Robinhood Chain fee revenue dropped from roughly $8 million a day in early September to about $230,000 by Sept. 16, while transaction counts declined only 32%.
Robinhood Chain Hits Record $3.7 Billion in 24-Hour DEX Volume as Arbitrum Revenue Sharing Draws Debate
Robinhood Chain set a new all-time high of $3.7 billion in 24-hour DEX volume on September 5, while an Arbitrum co-founder and Solana co-founder clashed over the merits of Robinhood's revenue-sharing model.
