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Improved Classical and Quantum Algorithms for the Shortest Vector Problem via Bounded Distance Decoding. (arXiv:2002.07955v5 [cs.DS] UPDATED)
May 11, 2022, 1:20 a.m. | Divesh Aggarwal, Yanlin Chen, Rajendra Kumar, Yixin Shen
cs.CR updates on arXiv.org arxiv.org
The most important computational problem on lattices is the Shortest Vector
Problem (SVP). In this paper, we present new algorithms that improve the
state-of-the-art for provable classical/quantum algorithms for SVP. We present
the following results. $\bullet$ A new algorithm for SVP that provides a smooth
tradeoff between time complexity and memory requirement. For any positive
integer $4\leq q\leq \sqrt{n}$, our algorithm takes $q^{13n+o(n)}$ time and
requires $poly(n)\cdot q^{16n/q^2}$ memory. This tradeoff which ranges from
enumeration ($q=\sqrt{n}$) to sieving ($q$ constant), …
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