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1. WO2020110830 - INFORMATION PROCESSING DEVICE AND INFORMATION PROCESSING METHOD

Publication Number WO/2020/110830
Publication Date 04.06.2020
International Application No. PCT/JP2019/045275
International Filing Date 19.11.2019
IPC
G09C 1/00 2006.01
GPHYSICS
09EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
CCIPHERING OR DECIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHER PURPOSES INVOLVING THE NEED FOR SECRECY
1Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system
G06F 16/00 2019.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
FELECTRIC DIGITAL DATA PROCESSING
16Information retrieval; Database structures therefor; File system structures therefor
H04L 9/14 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
9Arrangements for secret or secure communication
14using a plurality of keys or algorithms
CPC
G06F 16/00
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
16Information retrieval; Database structures therefor; File system structures therefor
G09C 1/00
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
CCODING OR CIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHER PURPOSES INVOLVING THE NEED FOR SECRECY
1Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system
H04L 9/08
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
9Cryptographic mechanisms or cryptographic; arrangements for secret or secure communication
08Key distribution ; or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
H04L 9/14
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
9Cryptographic mechanisms or cryptographic; arrangements for secret or secure communication
14using a plurality of keys or algorithms
Applicants
  • ソニー株式会社 SONY CORPORATION [JP]/[JP]
Inventors
  • 内田 篤史 UCHIDA, Atsushi
  • 丸山 信也 MARUYAMA, Shinya
Agents
  • 特許業務法人酒井国際特許事務所 SAKAI INTERNATIONAL PATENT OFFICE
Priority Data
2018-22003826.11.2018JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) INFORMATION PROCESSING DEVICE AND INFORMATION PROCESSING METHOD
(FR) DISPOSITIF DE TRAITEMENT D'INFORMATIONS ET PROCÉDÉ DE TRAITEMENT D'INFORMATIONS
(JA) 情報処理装置および情報処理方法
Abstract
(EN)
Provided is an information processing device comprising: a communication unit that uses a first distributed key to receive a calculated first hash value from a terminal; and a dividing unit that uses a second distributed key, corresponding to the first distributed key, on the first hash value to perform a homomorphic hash computation, and determines a division unit for words used in a document search on the basis of matching of a calculated second hash value and an encrypted dictionary, the communication unit transmitting, to the terminal, encryption information pertaining to the division unit determined by the dividing unit.
(FR)
L'invention concerne un dispositif de traitement d'informations comprenant : une unité de communication qui utilise une première clé distribuée pour recevoir une première valeur de hachage calculée d'un terminal ; et une unité de séparation qui utilise une seconde clé distribuée, correspondant à la première clé distribuée, sur la première valeur de hachage afin d’effectuer un calcul de hachage homomorphique, puis détermine une unité de division pour des mots utilisés dans une recherche de document d’après la mise en correspondance d'une seconde valeur de hachage calculée et d'un dictionnaire chiffré, l'unité de communication transmettant, au terminal, des informations de chiffrement relatives à l'unité de division déterminée par l'unité de séparation.
(JA)
第1の分散鍵を用いて算出された第1のハッシュ値を端末から受信する通信部と、前記第1のハッシュ値に対し前記第1の分散鍵に対応する第2の分散鍵を用いて準同型ハッシュ演算を行い、算出した第2のハッシュ値と暗号化辞書とのマッチングに基づいて文書検索に用いられる単語の分割単位を決定する分割部と、を備え、前記通信部は、前記分割部により決定された前記分割単位に係る暗号化情報を前記端末に送信する、情報処理装置が提供される。
Also published as
Latest bibliographic data on file with the International Bureau