Approximating the closest vector problem using an approximate shortest vector oracle

  • Authors:
  • Chandan Dubey;Thomas Holenstein

  • Affiliations:
  • Institute for Theoretical Computer Science, ETH Zurich;Institute for Theoretical Computer Science, ETH Zurich

  • Venue:
  • APPROX'11/RANDOM'11 Proceedings of the 14th international workshop and 15th international conference on Approximation, randomization, and combinatorial optimization: algorithms and techniques
  • Year:
  • 2011

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Abstract

We give a polynomial time Turing reduction from the γ2 √n- approximate closest vector problem on a lattice of dimension n to a γ-approximate oracle for the shortest vector problem. This is an improvement over a reduction by Kannan, which achieved γ2n3/2.