Efficient Implementation of Knuth Yao Sampler on Reconfigurable Hardware

Lattice-based cryptography offers a promising alternative to traditional cryptographic schemes due to its resistance against quantum attacks. Discrete Gaussian sampling plays a crucial role in lattice-based cryptographic algorithms such as Ring Learning with error (R-LWE) for generating the coefficient of the polynomials. The Knuth Yao Sampler is a widely used discrete Gaussian sampling technique in Lattice-based cryptography. On the other hand, Lattice based cryptography involves resource intensive complex computation. Due to the presence of inherent parallelism, on field programmability Field Programmable Gate Array (FPGA) based reconfigurable hardware can be a good platform for the implementation of Lattice-based cryptographic algorithms. In this work, an efficient implementation of Knuth Yao Sampler on reconfigurable hardware is proposed that not only reduces the resource utilization but also enhances the speed of the sampling operation. The proposed method reduces look up table (LUT) requirement by almost 29% and enhances the speed by almost 17 times compared to the method proposed by the authors in (Sinha Roy et al., 2014).