HOGE: Homomorphic Gate on An FPGA*

2024 29th Asia and South Pacific Design Automation Conference (ASP-DAC)(2024)

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摘要
This paper proposes HOGE, a new accelerator architecture on FPGA, for the Fully Homomorphic Encryption over the Torus (TFHE). TFHE is one of the FHE schemes that allows arbitrary logical circuits to be evaluated over encrypted ciphertexts. To the best of the our knowledge, HOGE is the first hardware architecture that achieves the evaluation of a complete homomorphic gate with bootstrapping in one commercial hardware device and the proven capability for working with the host machine to evaluate homomorphic logic circuits. HOGE is equipped with the carefully designed resource-efficient four-step radix-32 NTT/INTT architectures that achieve higher parallelism, resulting in an overall lower latency. HOGE is implemented on the Xilinx Alveo U280 platform and demonstrated that the actual performance can be 5 – 6 × faster than the-state-of-the-art CPU implementation of TFHE, carrying out a homomorphic gate within about 1.6ms.
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关键词
FPGA,Homomorphic Encryption,TFHE
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