ENGLISH

Locally Decodable Codes and Private Information Retrieval Schemes

By Sergey Yekhanin (auth.)

Book information

Publisher
Springer-Verlag Berlin Heidelberg
Year
2010
ISBN
3642143571, 9783642143571, 9783642143588
DOI
10.1007/978-3-642-14358-8
LCC
QA76.9.A25 Y45 2010
Open Library ID
OL25161834M
Language
english
Format
PDF
Filesize
643 kB (657967 bytes)
Series
Information Security and Cryptography
Edition
1
Pages
82\95
Topic
Art Graphic Arts
Time added
2011-06-04 13:46:07
Cryptology and Information TheoryData Structures

Description

Locally decodable codes (LDCs) are codes that simultaneously provide efficient random access retrieval and high noise resilience by allowing reliable reconstruction of an arbitrary bit of a message by looking at only a small number of randomly chosen codeword bits. Local decodability comes with a certain loss in terms of efficiency – specifically, locally decodable codes require longer codeword lengths than their classical counterparts. Private information retrieval (PIR) schemes are cryptographic protocols designed to safeguard the privacy of database users. They allow clients to retrieve records from public databases while completely hiding the identity of the retrieved records from database owners. In this book the author provides a fresh algebraic look at the theory of locally decodable codes and private information retrieval schemes, obtaining new families of each which have much better parameters than those of previously known constructions, and he also proves limitations of two server PIRs in a restricted setting that covers all currently known schemes. The author's related thesis won the ACM Dissertation Award in 2007, and this book includes some expanded sections and proofs, and notes on recent developments.

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