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1. WO2019051052 - METHOD, APPARATUS AND SYSTEM FOR DATA ENCRYPTION AND DECRYPTION

Publication Number WO/2019/051052
Publication Date 14.03.2019
International Application No. PCT/US2018/049700
International Filing Date 06.09.2018
IPC
H04L 9/00 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
9Arrangements for secret or secure communication
CPC
H04L 2209/24
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
24Key scheduling, i.e. generating round keys or sub-keys for block encryption
H04L 2209/38
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
38Chaining, e.g. hash chain or certificate chain
H04L 2463/062
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
2463Additional details relating to network architectures or network communication protocols for network security covered by H04L63/00
062applying encryption of the keys
H04L 63/0435
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
63Network architectures or network communication protocols for network security
04for providing a confidential data exchange among entities communicating through data packet networks
0428wherein the data content is protected, e.g. by encrypting or encapsulating the payload
0435wherein the sending and receiving network entities apply symmetric encryption, i.e. same key used for encryption and decryption
H04L 63/045
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
63Network architectures or network communication protocols for network security
04for providing a confidential data exchange among entities communicating through data packet networks
0428wherein the data content is protected, e.g. by encrypting or encapsulating the payload
045wherein the sending and receiving network entities apply hybrid encryption, i.e. combination of symmetric and asymmetric encryption
H04L 63/0823
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
63Network architectures or network communication protocols for network security
08for supporting authentication of entities communicating through a packet data network
0823using certificates
Applicants
  • ALIBABA GROUP HOLDING LIMITED
Inventors
  • LIU, Wenqing
  • PENG, Juntao
Agents
  • MURABITO, Anthony, C.
Priority Data
201710800850.306.09.2017CN
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD, APPARATUS AND SYSTEM FOR DATA ENCRYPTION AND DECRYPTION
(FR) PROCÉDÉ, APPAREIL ET SYSTÈME DE CHIFFREMENT ET DE DÉCHIFFREMENT DE DONNÉES
Abstract
(EN)
Method, apparatus and system for data encryption and decryption. In an embodiment, the method comprises: generating a block key and encrypting to-be-uploaded data based on the block key to obtain encrypted data; encrypting the block key based on a public key of a preset target object to obtain an encrypted block key corresponding to the preset target object; generating upload data based on the encrypted data and the encrypted block key, and uploading the upload data to a blockchain. The present invention solves the technical problems of excessive workload and complicated operation caused by implementing data access permission control in the blockchain.
(FR)
L'invention concerne un procédé, un appareil et un système de chiffrement et de déchiffrement de données. Dans un mode de réalisation, le procédé consiste à : générer une clé de bloc et chiffrer des données à transférer sur la base de la clé de bloc pour obtenir des données chiffrées ; chiffrer la clé de bloc sur la base d'une clé publique d'un objet cible prédéfini afin d'obtenir une clé de bloc chiffrée correspondant à l'objet cible prédéfini ; générer des données de transfert sur la base des données chiffrées et de la clé de bloc chiffrée ; et transférer les données de transfert vers une chaîne de blocs. La présente invention résout les problèmes techniques d'une charge de travail excessive et d'un fonctionnement complexe causés par la mise en œuvre d'une commande d'autorisation d'accès à des données dans la chaîne de blocs.
Also published as
Latest bibliographic data on file with the International Bureau