CoFHEE: A Co-processor for Fully Homomorphic Encryption Execution
Mohammed Nabeel, Deepraj Soni, Mohammed Ashraf, Mizan Abraha Gebremichael, Homer Gamil, Eduardo Chielle, Ramesh Karri, Mihai Sanduleanu, Michail Maniatakos · 2023
In this paper, we present the blueprint of a specialized co-processor for Fully Homomorphic Encryption, dubbed CoFHEE. With a small design area of$12mm^{2}$, CoFHEE incorporates ASIC implementations of fundamental polynomial operations, such as polynomial addition and subtraction, Hadamard product, and Number Theoretic Transform, which are underneath all higher-level FHE primitives. CoFHEE has native support of polynomial degrees of up to$n=2^{14}$with a coefficient size of 128 bits. We evaluate our chip with performance and power experiments and compare it against state-of-the-art software implementations and other ASIC designs. A more elaborate description of the CoFHEE design can be found in [1].