We show that, assuming NP $\not\subseteq$ $\cap_{δ> 0}$DTIME$\left(\exp{n^δ}\right)$, the shortest vector problem for lattices of rank $n$ in any finite $\ell_p$ norm is hard to approximate within a factor of $2^{(\log n)^{1 - o(1)}}$, via a deterministic reduction. Previously, for the Euclidean case $p=2$, even hardness of the exact shortest vector problem was not known under a deterministic reduction.
翻译:我们证明,假设NP $\not\subseteq$ $\cap_{δ>0}$DTIME$\left(\exp{n^δ}\right)$,则对于秩为$n$的格在任意有限$\ell_p$范数中的最短向量问题,通过确定性归约,其近似比因子$2^{(\log n)^{1 - o(1)}}$内的求解是困难的。此前,对于欧几里得情形$p=2$,即使在确定性归约下,精确最短向量问题的难度也尚未可知。