3-QUERY LOCALLY DECODABLE CODES OF SUBEXPONENTIAL LENGTH

被引:60
|
作者
Efremenko, Klim [1 ]
机构
[1] Tel Aviv Univ, Blavatnik Sch Comp Sci, IL-69978 Tel Aviv, Israel
基金
以色列科学基金会;
关键词
locally decodable codes; private information retrieval; LOWER BOUNDS; CONSTRUCTIONS;
D O I
10.1137/090772721
中图分类号
TP301 [理论、方法];
学科分类号
081202 ;
摘要
Locally decodable codes (LDCs) allow one to decode any particular symbol of the input message by making a constant number of queries to a codeword, even if a constant fraction of the codeword is damaged. In a recent work [J. ACM, 55 (2008), article 1], Yekhanin constructs a 3-query LDC with subexponential length. However, this construction requires a conjecture that there are infinitely many Mersenne primes. In this paper, we give the first unconditional constant query LDC construction with subexponential codeword length. In addition, our construction reduces codeword length.
引用
收藏
页码:1694 / 1703
页数:10
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