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1. WO2020065633 - METHOD, USER DEVICE, MANAGEMENT DEVICE, STORAGE MEDIUM AND COMPUTER PROGRAM PRODUCT FOR KEY MANAGEMENT

Publication Number WO/2020/065633
Publication Date 02.04.2020
International Application No. PCT/IB2019/058292
International Filing Date 30.09.2019
IPC
H04L 9/08 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
9Arrangements for secret or secure communication
08Key distribution
H04L 29/06 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
29Arrangements, apparatus, circuits or systems, not covered by a single one of groups H04L1/-H04L27/136
02Communication control; Communication processing
06characterised by a protocol
G06F 21/60 2013.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
FELECTRIC DIGITAL DATA PROCESSING
21Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
60Protecting data
H04L 9/32 2006.01
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
CPC
G06F 21/602
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
21Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
60Protecting data
602Providing cryptographic facilities or services
H04L 63/062
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
63Network architectures or network communication protocols for network security
06for supporting key management in a packet data network
062for key distribution, e.g. centrally by trusted party
H04L 63/08
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
H04L 9/0643
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
0643Hash functions, e.g. MD5, SHA, HMAC or f9 MAC
H04L 9/0825
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
0819Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
0825using asymmetric-key encryption or public key infrastructure [PKI], e.g. key signature or public key certificates
H04L 9/083
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
0819Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
083involving central third party, e.g. key distribution center [KDC] or trusted third party [TTP]
Applicants
  • VECHAIN GLOBAL TECHNOLOGY S.A.R.L [LU]/[LU]
Inventors
  • ZHANG, Lei
  • MA, Bangya
  • GU, Jianliang
Priority Data
201811161190.X30.09.2018CN
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD, USER DEVICE, MANAGEMENT DEVICE, STORAGE MEDIUM AND COMPUTER PROGRAM PRODUCT FOR KEY MANAGEMENT
(FR) PROCÉDÉ, DISPOSITIF UTILISATEUR, DISPOSITIF DE GESTION, SUPPORT DE STOCKAGE ET PRODUIT DE PROGRAMME INFORMATIQUE POUR LA GESTION DE CLÉS
Abstract
(EN)
The present disclosure provides methods and devices for key management. In one example, a method of key management comprises: obtaining, at a user device, a number of users in a group of users and a minimum number of users for restoring a transaction key; randomly generating the transaction key; splitting the transaction key into a plurality of sub-keys, the number of sub-keys being the same as the number of users; and sending the plurality of sub-keys to a management device, each of the plurality of sub-keys being encrypted with a public key of a user corresponding to a sub-key.
(FR)
L'invention concerne des procédés et des dispositifs de gestion de clés. Dans un exemple, un procédé de gestion de clé consiste à : obtenir, au niveau d'un dispositif utilisateur, un certain nombre d'utilisateurs dans un groupe d'utilisateurs et un nombre minimum d'utilisateurs pour restaurer une clé de transaction; générer de manière aléatoire la clé de transaction; diviser la clé de transaction en une pluralité de sous-clés, le nombre de sous-clés étant le même que le nombre d'utilisateurs; et envoyer la pluralité de sous-clés à un dispositif de gestion, chacune de la pluralité de sous-clés étant chiffrée avec une clé publique d'un utilisateur correspondant à une sous-clé.
Also published as
Latest bibliographic data on file with the International Bureau