Privacy projectFhenix: FHE coprocessor.
Fhenix builds CoFHE, a fully homomorphic encryption coprocessor that lets an ordinary EVM contract hand encrypted work to an off-chain compute layer and get a verified result back. A team can add confidential state to the chain it already ships on instead of migrating to a new one. The architecture came out of the team's own benchmarking: an early plan for a dedicated FHE rollup gave way to the coprocessor once the numbers came in, and a Series A followed the redesign. Encrypted operations resolve asynchronously rather than inside the same block, on the timescales FHE itself sets, and a threshold committee holds the decryption keys. A mainnet first sketched for early 2025 was still running as a testnet through mid 2026.
Key facts
- Entry type
- Privacy project
- Category
- FHE coprocessor
- Technology
- Fully homomorphic encryption (FHE)
- Website
- www.fhenix.io
What is fully homomorphic encryption?
Computation is performed directly on ciphertext, so results decrypt correctly without the data ever being decrypted during the computation.
How it compares with the other approaches on latency, trust assumptions and fit is set out, with sources, in the technology taxonomy.
Private by design.
See how confidential transactions work on the networks you already use.