FHE is undergoing standardization right now. The leading algorithm candidates are based on lattice crypto which is currently quantum-safe: https://homomorphicen

FHE is undergoing standardization right now. The leading algorithm candidates are based on lattice crypto which is currently quantum-safe: https://homomorphicencryption.org/ https://homomorphicencryption.org/ Here are some mature and actively-developed HE libraries: https://github.com/homenc/HElib https://github.com/homenc/HElib (By IBM, employed the inventor of FHE) https://github.com/Microsoft/SEAL https://github.com/Microsoft/SEAL (Best tutorials) https://palisade-crypto.org/software-library https://palisade-crypto.org/software-library (High-quality codebase) https://github.com/tfhe/tfhe https://github.com/tfhe/tfhe (Fast boolean logic, used by Cingulata) Good introductory material is hard to come by, but I like the first half of this talk: https://simons.berkeley.edu/talks/intro-fhe-and-tfhe https://simons.berkeley.edu/talks/intro-fhe-and-tfhe