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1. WO2017064780 - FILE ENCRYPTION DEVICE, FILE DECRYPTION DEVICE, SYSTEM, AND PROGRAM

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Publication Number WO/2017/064780
Publication Date 20.04.2017
International Application No. PCT/JP2015/079099
International Filing Date 14.10.2015
IPC
H04L 9/32 2006.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
9Arrangements for secret or secure communication
32including means for verifying the identity or authority of a user of the system
G06F 21/62 2013.1
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
FELECTRIC DIGITAL DATA PROCESSING
21Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
60Protecting data
62Protecting access to data via a platform, e.g. using keys or access control rules
G09C 1/00 2006.1
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
H04L 9/08 2006.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
9Arrangements for secret or secure communication
08Key distribution
CPC
G06F 21/62
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
21Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
60Protecting data
62Protecting access to data via a platform, e.g. using keys or access control rules
G06F 21/6209
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
21Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
60Protecting data
62Protecting access to data via a platform, e.g. using keys or access control rules
6209to a single file or object, e.g. in a secure envelope, encrypted and accessed using a key, or with access control rules appended to the object itself
G06F 21/6218
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
21Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
60Protecting data
62Protecting access to data via a platform, e.g. using keys or access control rules
6218to a system of files or objects, e.g. local or distributed file system or database
G09C 1/00
GPHYSICS
09EDUCATION; 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
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 9/0816
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
0816Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
Applicants
  • ファイナルコード　インコーポレイテッド FINALCODE, INC. [US]/[US]
Inventors
  • 道具　登志夫 DOGU Toshio
  • 高橋　則行 TAKAHASHI Noriyuki
  • 松本　卓也 MATSUMOTO Takuya
Agents
  • 龍華国際特許業務法人 RYUKA IP LAW FIRM
Priority Data
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) FILE ENCRYPTION DEVICE, FILE DECRYPTION DEVICE, SYSTEM, AND PROGRAM
(FR) DISPOSITIF DE CHIFFREMENT DE FICHIER, DISPOSITIF DE DÉCHIFFREMENT DE FICHIER, SYSTÈME, ET PROGRAMME
(JA) ファイル暗号化装置、ファイル復号化装置、システム、及びプログラム
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Abstract
(EN) A file encryption device is provided with: an encryption key acquisition unit for acquiring one or more encryption keys set for each of one or more users having permission to access an electronic file; a file encryption unit that encrypts an electronic file; a supplementary information encryption unit that uses one or more of the encryption keys to encrypt supplementary information including a file decryption key required to decrypt the encrypted electronic file; and an output unit that associates the encrypted supplementary information with the encrypted electronic file and outputs the result.
(FR) L’invention concerne un dispositif de chiffrement de fichier comprenant : une unité d'acquisition de clé de chiffrement pour acquérir un ou plusieurs ensembles de clés de chiffrement pour chacun d'un ou plusieurs utilisateurs disposant d’une permission d'accès à un fichier électronique ; une unité de chiffrement de fichier qui chiffre un fichier électronique ; une unité de chiffrement d'informations supplémentaires qui utilise une ou plusieurs des clés de chiffrement pour chiffrer des informations supplémentaires comprenant une clé de déchiffrement de fichier requise pour déchiffrer le fichier électronique chiffré ; et une unité de sortie qui associe les informations supplémentaires chiffrées au fichier électronique chiffré et délivre le résultat en sortie.
(JA) ファイル暗号化装置は、電子ファイルにアクセスすることが許可された１以上のユーザのそれぞれに対して定められた１以上の暗号化鍵を取得する暗号化鍵取得部と、電子ファイルを暗号化するファイル暗号化部と、暗号化された電子ファイルの復号化に必要なファイル復号化鍵を含む付帯情報を、前記１以上の暗号化鍵を用いて暗号化する付帯情報暗号化部と、暗号化された付帯情報を、前記暗号化された電子ファイルに対応づけて出力する出力部とを備える。
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