Two Ant Group Research Papers on FHE Accelerators Accepted at ISCA 2025

ISCA, one of the four top conferences in computer architecture, announced its 2025 paper acceptance results, receiving 570 submissions and selecting 127 papers (22.3% acceptance rate). Among the accepted works, two papers from Ant Group's Computing Systems Lab were highlighted.

FAST: An FHE Accelerator for Scalable‑parallelism with Tunable‑bit proposes a hardware accelerator that integrates recent cryptographic optimizations such as hoisting and a key‑switching decomposition method (KLSS). The design features a dynamic framework supporting multiple key‑switching strategies, a scalable and precision‑adjustable multiplier, and a novel data organization that together deliver a 1.8× performance improvement.

Neo: Towards Efficient Fully Homomorphic Encryption Acceleration using Tensor Core presents a GPU‑based FHE acceleration framework that deeply optimizes Tensor Core architecture. By reformulating key operators (e.g., Base Conversion, Inner Product) as matrix multiplications and employing data‑reordering strategies, Neo achieves up to 3.7× operator speedup and a 1.65× throughput increase using FP64 units for high‑bit operations, resulting in an average 3.28× acceleration on NVIDIA A100 GPUs.

Ant Group's Technology Institute, founded in 2015, comprises labs in cryptography, computing systems, interactive intelligence, and reinforcement learning, focusing on secure and efficient advanced computing systems. Its research on privacy‑computing accelerators and AI‑distributed systems has been repeatedly accepted at premier conferences such as ISCA, MICRO, ASPLOS, and HPCA.