Faster Gaussian Lattice Sampling Using Lazy Floating-Point Arithmetic

  title={Faster Gaussian Lattice Sampling Using Lazy Floating-Point Arithmetic},
  author={L{\'e}o Ducas and Phong Q. Nguyen},
Many lattice cryptographic primitives require an efficient algorithm to sample lattice points according to some Gaussian distribution. All algorithms known for this task require long-integer arithmetic at some point, which may be problematic in practice. We study how much lattice sampling can be sped up using floating-point arithmetic. First, we show that a direct floating-point implementation of these algorithms does not give any asymptotic speedup: the floating-point precision needs to be… CONTINUE READING
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