TFHE-rs is a pure Rust implementation of the TFHE homomorphic encryption scheme, offering APIs for boolean and integer arithmetic over encrypted data. It targets developers and researchers seeking a high-performance, production-ready library for advanced TFHE features, providing control without low-level implementation burdens.

How It Works

TFHE-rs implements Zama's variant of TFHE, including programmable bootstrapping. It supports a boolean API for drop-in replacement and a short integer API for exact, unbounded FHE integer arithmetic up to 8 bits. The library emphasizes size-efficient public-key encryption and ciphertext/server key compression for efficient data transfer.

Quick Start & Requirements

• Install via Cargo: tfhe = { version = "*", features = ["boolean", "shortint", "integer"] }
• Requires Rust version >= 1.84.
• AArch64 Windows is not supported due to missing entropy source.
• Run examples with cargo run --release.
• Documentation:
• Handbook:
• Tutorials:

Highlighted Details

• Implements TFHE boolean API and short integer API for exact, unbounded FHE integer arithmetic.
• Offers full Rust API, C bindings, and client-side WASM API.
• Supports size-efficient public key encryption and key compression.
• Stable v1.0.0 released February 2025 for x86 CPU backend.

Maintenance & Community

• Community support available via Discord/Slack.
• Contributions welcome via issues or becoming an official contributor (requires CLA).
• Zama is the primary developer.

Licensing & Compatibility

• Licensed under BSD-3-Clause-Clear.
• Free for development, research, prototyping, and experimentation.
• Commercial use requires a separate patent license from Zama.

Limitations & Caveats

Side-channel attack mitigation is not yet implemented. The default security parameters for the GPU backend assume IND-CPA security and that decrypted results are not shared.