CONTENT DATA DISTRIBUTION SYSTEM, CONTENT REPRODUCTION SYSTEM, CONTENT DATA DISTRIBUTION METHOD AND PROGRAM

Title:

CONTENT DATA DISTRIBUTION SYSTEM, CONTENT REPRODUCTION SYSTEM, CONTENT DATA DISTRIBUTION METHOD AND PROGRAM

Document Type and Number:

WIPO Patent Application WO/2019/167126

Kind Code:

A1

Abstract:

Provided is a system used in the field of the Internet of Things (IOT), more specifically, a distribution system for reconstructing content data from a plurality of dispersion pieces when a plurality of terminals that have respectively received arbitrary dispersion pieces satisfy a predetermined condition. A generation means 111 generates, from content data, n dispersion pieces different from each other according to a secret sharing method. A calculation means 112 calculates the hash values of the respective dispersion pieces. A distribution means 113 distributes an arbitrary dispersion piece from among the plurality of dispersion pieces to each of a plurality of terminals 2. An acquisition means 114 acquires each of the hash values of the dispersion pieces from two or more terminals. When the terminals 2 satisfy a predetermined condition, a determination means 115 compares the hash values acquired from the terminals 2 with the hash values calculated by the calculation means 112 and determines whether the content data can be reconstructed. When it is determined that reconstruction is possible, a reconstruction means 116 reconstructs the content data by acquiring the dispersion pieces from the respective terminals 2.

Inventors:

SONODA TAKASHI (JP)
KURIHARA YOUSUKE (JP)
TAKENOSHITA KOUYOU (JP)
TANIGUCHI MASAHITO (JP)

Application Number:

PCT/JP2018/007284

Publication Date:

September 06, 2019

Filing Date:

February 27, 2018

Export Citation:

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Assignee:

UHURU CORP (JP)

International Classes:

H04N21/2387; G06F13/00; G06F21/60

Foreign References:

JP2010198349A	2010-09-09
JP2008276686A	2008-11-13

Other References:

HOSAKA, M. ET AL.: "On Constructions of Secret Sharing System Realizing Perfect Privacy via a Physical RNG and Integrity via Hash Values", J , (IEICE TECHNICAL REPORT, vol. 113, no. 479, 28 February 2014 (2014-02-28), pages 41 - 46, ISSN: 0913-5685

Attorney, Agent or Firm:

ASAHI PATENT FIRM (JP)

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