Fhenix Unveiled: Decomposable BFV — Exact FHE Powering Ethereum’s Privacy Future

Fhenix has introduced Decomposable BFV (dBFV), a new fully homomorphic encryption scheme designed for Ethereum L2. Unlike traditional BFV, dBFV breaks arithmetic circuits into independent parallel integer slots, achieving claimed 100x throughput gains while avoiding noise accumulation. The fhEVM coprocessor model offloads FHE computation off-chain, keeping L2 gas costs low via threshold decryption networks. This enables exact integer arithmetic in Solidity smart contracts — critical for DeFi use cases like dark pools, confidential lending, and on-chain ML where approximation-based schemes like CKKS fail. A detailed Solidity smart contract example demonstrates FHE-encrypted position management with risk scoring. The post also covers dBFV's advantages over ZKPs for dynamic logic, and outlines a roadmap including GPU/ASIC acceleration and quantum-resistant lattices.