Zama – FHE SDK & Confidential Smart Contracts (Fully Homomorphic Encryption for EVM)
Fits with patterns
- Private Stablecoin Shielded Payments - FHE enables encrypted balances/amounts for confidential transfers
- Private Intent-Based Vaults - FHE-enabled chains allow private strategy execution while keeping assets auditable
- Shielded ERC-20 Transfers - Native FHE implementation for confidential token transfers
- Private L2s - Zama's fhEVM provides FHE-based rollup capabilities
- Shielding - FHE can complement ZK approaches for confidential balance management
Not a substitute for
- ZK-based L2 privacy (e.g., Aztec, Scroll)
- MPC or TEEs for off-chain privacy computation
Architecture
Smart contracts are compiled with Zama’s FHE libraries (e.g., concrete, fhEVM) allowing arithmetic on encrypted values. Execution happens deterministically, with ciphertexts persisted on-chain.
Privacy domains
- FHE encryption at the contract and variable level.
- Supports hybrid models (FHE + ZK for verification).
Enterprise demand and use cases
- Financial institutions seeking on-chain confidentiality with deterministic settlement.
- Private vaults, confidential lending, or yield strategies.
Technical details
- EVM-compatible FHE runtime (
fhEVM) - SDKs for Solidity and TypeScript
- Ongoing collaborations with Fhenix and Aleph Zero
Strengths
- Native EVM integration
- Strong cryptographic research pedigree
- Open-source and actively maintained
Risks and open questions
- High compute cost and latency
- Limited developer tooling maturity
- Interoperability between FHE networks still emerging