STORAGE COUNT VERIFICATION SYSTEM

WIPO Patent Application WO/2014/203339

A1

A storage count verification system is provided in which a client can verify the number of identical data items stored by a server without the server being notified of the results. A storage count verification system for verifying whether a user device and a server device have identical data in a case where search data requested by a user device is used to search data to be searched on a server device, wherein the server device is provided with a server generation unit for generating a public parameter for searching the data to be searched and a server communication unit for transmitting the generated public parameter to the user device and the user device is provided with a user generation unit for generating, on the basis of the public parameter received from the server device, a secret parameter that is for the search data and corresponds to the public parameter and a user encryption unit for encrypting the search data on the basis of the generated secret parameter.

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YOSHINO MASAYUKI (JP)
SATO HISAYOSHI (JP)

PCT/JP2013/066763

December 24, 2014

June 18, 2013

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HITACHI LTD (JP)

G09C1/00; G06F17/30

WO2013080365A1	2013-06-06
WO2011086668A1	2011-07-21
WO2012077541A1	2012-06-14

JP2012123614A	2012-06-28
JP2012049679A	2012-03-08

EMILIANO DE CRISTOFARO; PAOLO GASTI; GENE TSUDIK: "Cryptography ePring Archive 2011/141", FAST AND PRIVATE COMPUTATION OF CARDINALITY OF SET INTERSECTION AND UNION
See also references of EP 3012817A4

POLAIRE I. P. C. (JP)
Polaire Intellectual Property Corporation (JP)

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