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1. WO2019206949 - METHOD AND SYSTEM FOR ENSURING THE INTEGRITY OF BROADCAST CONFIDENTIAL DATA

Publication Number WO/2019/206949
Publication Date 31.10.2019
International Application No. PCT/EP2019/060444
International Filing Date 24.04.2019
IPC
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
H04W 12/10 2009.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
12Security arrangements, e.g. access security or fraud detection; Authentication, e.g. verifying user identity or authorisation; Protecting privacy or anonymity
10Integrity
H04K 1/00 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
KSECRET COMMUNICATION; JAMMING OF COMMUNICATION
1Secret communication
H04L 9/30 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
9Arrangements for secret or secure communication
28using particular encryption algorithm
30Public key, i.e. encryption algorithm being computationally infeasible to invert and users' encryption keys not requiring secrecy
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
H04K 1/00
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
KSECRET COMMUNICATION; JAMMING OF COMMUNICATION
1Secret communication
H04L 63/123
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
63Network architectures or network communication protocols for network security
12Applying verification of the received information
123received data contents, e.g. message integrity
H04L 9/304
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
9Cryptographic mechanisms or cryptographic; arrangements for secret or secure communication
30Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy
304based on error correction codes, e.g. McEliece
H04L 9/3236
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
9Cryptographic mechanisms or cryptographic; arrangements for secret or secure communication
32including means for verifying the identity or authority of a user of the system ; or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
3236using cryptographic hash functions
H04W 12/1006
Applicants
  • THALES [FR]/[FR]
Inventors
  • GARRIDO, Eric
  • PAINCHAULT, Philippe
  • BELAID, Sonia
  • MARTINELLI, Jean
  • DELAVEAU, François
  • KAMENI, Christiane
  • MOLIERE, Renaud
Agents
  • DUDOUIT, Isabelle
  • LUCAS, Laurent
Priority Data
18/0037126.04.2018FR
Publication Language French (FR)
Filing Language French (FR)
Designated States
Title
(EN) METHOD AND SYSTEM FOR ENSURING THE INTEGRITY OF BROADCAST CONFIDENTIAL DATA
(FR) PROCEDE ET SYSTEME POUR ASSURER L'INTEGRITE DE DONNEES CONFIDENTIELLES DIFFUSEES
Abstract
(EN)
The invention relates to a method for ensuring data integrity characterized in that it comprises at least the following steps: To transmit a message xi the sender A adds to the message xi containing the data to be transmitted a label tag, defined by tagi=h(Xi), by using a function h known only to the sender A and to the receiver B, and which is intended to guarantee the authentication and the checking of integrity of the transmitted data (201), The message x*i composed of the message of the useful data xi and of the label tagi is encoded to produce a message C(x*i) which is transmitted to the receiver B, the encoding is carried out in such a way as to guarantee confidentiality with the aid of a secret coding (202), After transmission, the receiver B receives the message X*i to which it applies a secret decoding so as to retrieve a data message Xi and a label Tag, and then it checks the authentication and the integrity of the received useful message Xi by verifying that the relation tagi = hko(Xi) is in fact complied with, guaranteeing Xi = xi.
(FR)
L'invention concerne un procédé pour assurer l'intégrité de données caractérisé en ce qu'il comporte au moins les étapes suivantes : Pour transmettre un message xi l´ émetteur A ajoute au message xi contenant les données à transmettre une étiquette tag, définie par tagi=h(Xi), en utilisant une fonction h connue uniquement de l'émetteur A et du récepteur B, destinée à garantir l'authentification et le contrôle d'intégrité des données transmises (201), Le message x*i composé du message des données utiles xi et de l'étiquette tagi est encodé pour produire un message C(x*i) qui est transmis au récepteur B, l'encodage est réalisé de manière à garantir la confidentialité à l'aide d'un codage secret (202), Après transmission, le récepteur B reçoit le message X*i auquel il applique un décodage secret pour retrouver un message de données Xi et une étiquette Tag,, puis il contrôle l'authentification et l'intégrité du message utile reçu Xi en vérifiant que la relation tagi = hko(Xi) est bien respectée, garantissant Xi = xi·
Also published as
EP2019718722
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