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1. WO2007032070 - DATA PROTECTION PROCESSING METHOD, ITS DEVICE, DATA PROCESSING DEVICE, AND CIRCUIT DEVICE

Publication Number WO/2007/032070
Publication Date 22.03.2007
International Application No. PCT/JP2005/016978
International Filing Date 14.09.2005
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
H04L 9/06 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
9Arrangements for secret or secure communication
06the encryption apparatus using shift registers or memories for blockwise coding, e.g. D.E.S. systems
H04L 9/18 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
9Arrangements for secret or secure communication
18Encryption by serially and continuously modifying data stream elements, e.g. stream cipher systems
CPC
H04L 2209/12
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
2209Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
12Details relating to cryptographic hardware or logic circuitry
H04L 9/065
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
9Cryptographic mechanisms or cryptographic; arrangements for secret or secure communication
06the encryption apparatus using shift registers or memories for block-wise ; or stream; coding, e.g. DES systems ; or RC4; Hash functions; Pseudorandom sequence generators
065Encryption by serially and continuously modifying data stream elements, e.g. stream cipher systems, RC4, SEAL or A5/3
Applicants
  • 株式会社フューチャーテクノロジー研究所 Future Technology Institute Corporation [JP]/[JP] (AllExceptUS)
  • 長谷川 敏和 HASEGAWA, Toshikazu [JP]/[JP] (UsOnly)
  • マーティン シムズ MARTIN, Sims [GB]/[JP] (UsOnly)
Inventors
  • 長谷川 敏和 HASEGAWA, Toshikazu
  • マーティン シムズ MARTIN, Sims
Agents
  • 畝本 正一 UNEMOTO, Shoichi
Priority Data
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) DATA PROTECTION PROCESSING METHOD, ITS DEVICE, DATA PROCESSING DEVICE, AND CIRCUIT DEVICE
(FR) PROCÉDÉ DE TRAITEMENT DE LA PROTECTION DE DONNÉES, SON DISPOSITIF, DISPOSITIF DE TRAITEMENT DE DONNÉES ET DISPOSITIF DE CIRCUIT
(JA) データ防護処理方法、その装置、データ処理装置及び回路装置
Abstract
(EN)
There are provided a data protection processing method and device for processing digital data. The device and the method include: a process for generating encrypted data by mixing the digital data in bit unit by using protection key information as a parameter. Original data is divided into n-bit unit (N/n) to generate (N/n) sets of first data groups and a process for generating (N/n) sets of second data groups by mixing the first data groups in bit unit by shuffle processing. Moreover, the protection key information is calculated into digital data in bit unit for encryption.
(FR)
La présente invention concerne un procédé de traitement de la protection de données ainsi qu'un dispositif pour traiter les données numériques. Le dispositif et le procédé comprennent : un procédé pour générer des données cryptées en mélangeant les données numériques dans une unité de bit en utilisant comme paramètre les informations de la clé de protection. Les données initiales sont divisées en (N/n) unités de n-bit pour générer (N/n) jeux de premiers groupes de données et un procédé pour générer (N/n) jeux de seconds groupes de données en mélangeant les premiers groupes de données dans l'unité de bit par un procédé aléatoire. De plus, les informations sur la clé de protection sont calculées en données numériques dans l'unité de bit pour le cryptage.
(JA)
not available
Also published as
EP5783118
Latest bibliographic data on file with the International Bureau