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Title: MATCHA: a fast and energy-efficient accelerator for fully homomorphic encryption over the torus
Fully Homomorphic Encryption over the Torus (TFHE) allows arbitrary computations to happen directly on ciphertexts using homomorphic logic gates. However, each TFHE gate on state-of-the-art hardware platforms such as GPUs and FPGAs is extremely slow (> 0.2ms). Moreover, even the latest FPGA-based TFHE accelerator cannot achieve high energy efficiency, since it frequently invokes expensive double-precision floating point FFT and IFFT kernels. In this paper, we propose a fast and energy-efficient accelerator, MATCHA, to process TFHE gates. MATCHA supports aggressive bootstrapping key unrolling to accelerate TFHE gates without decryption errors by approximate multiplication-less integer FFTs and IFFTs, and a pipelined datapath. Compared to prior accelerators, MATCHA improves the TFHE gate processing throughput by 2.3x, and the throughput per Watt by 6.3x.  more » « less
Award ID(s):
1908992
PAR ID:
10353599
Author(s) / Creator(s):
; ;
Date Published:
Journal Name:
ACM/IEEE Design Automation Conference
Page Range / eLocation ID:
235 to 240
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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