FR3098953B1 - Method for secure data storage and system for implementing the method - Google Patents

Method for secure data storage and system for implementing the method Download PDF

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Publication number
FR3098953B1
FR3098953B1 FR2007516A FR2007516A FR3098953B1 FR 3098953 B1 FR3098953 B1 FR 3098953B1 FR 2007516 A FR2007516 A FR 2007516A FR 2007516 A FR2007516 A FR 2007516A FR 3098953 B1 FR3098953 B1 FR 3098953B1
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France
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crumbs
group
implementing
hash
encrypted
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FR2007516A
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French (fr)
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FR3098953A1 (en
Inventor
Cyril Dever
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Edgewhere
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Edgewhere
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Priority to PCT/FR2020/051295 priority Critical patent/WO2021014081A1/en
Publication of FR3098953A1 publication Critical patent/FR3098953A1/en
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Publication of FR3098953B1 publication Critical patent/FR3098953B1/en
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
    • H04L9/085—Secret sharing or secret splitting, e.g. threshold schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
    • H04L9/0819—Key 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)
    • H04L9/083—Key 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) involving central third party, e.g. key distribution center [KDC] or trusted third party [TTP]
    • H04L9/0833—Key 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) involving central third party, e.g. key distribution center [KDC] or trusted third party [TTP] involving conference or group key
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0894—Escrow, recovery or storing of secret information, e.g. secret key escrow or cryptographic key storage
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including 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
    • H04L9/3236—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including 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 using cryptographic hash functions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/16—Obfuscation or hiding, e.g. involving white box

Abstract

TITRE : « Procédé de stockage sécurisé de données et système de mise en œuvre du procédé » Procédé de stockage sécurisé d’une donnée source (DS) d’un détenteur (To) avec la participation de tiers (Tj (j=1…m)) ayant chacun une clé publique (Kj) et une clé privée ( . Le procédé caractérisé consiste à -obfusquer (Ob) la donnée source (DS) - fractionner (Fr) la donnée obfusquée (Ob (MS)) en miettes (Mi) (i = 1…n) - répartir les miettes (Mi) en groupes Gj (j=…m ou j=0,1…m), chaque miette étant présente dans au moins deux groupes Gj, le nombre de groupes étant égal au nombre de participants, - attribuer un groupe (Gj) à chaque participants (Pj) - crypter (Kj) les miettes (Mi) de chaque groupe (Gj) par le participant attributaire du groupe avec sa clé publique (Kj) - regrouper les miettes cryptées (Kj (Mi) → Σ Kj [Gj (Mi)]) - hacher (H) la donnée source (DS) par le détenteur (To) et crypter le hash - composer la donnée transformée comme message (MC) combinant le hash HX (DS) crypté et les miettes cryptées (Kj (Mi)). Figure 1TITLE: "Method for secure data storage and system for implementing the method" Method for secure storage of a source data (DS) of a holder (To) with the participation of third parties (Tj (j = 1… m )) each having a public key (Kj) and a private key (. The characterized method consists of -obfusing (Ob) the source data (DS) - splitting (Fr) the obfuscated data (Ob (MS)) into crumbs (Mi ) (i = 1… n) - divide the crumbs (Mi) into groups Gj (j =… m or j = 0.1… m), each crumb being present in at least two groups Gj, the number of groups being equal to the number of participants, - assign a group (Gj) to each participant (Pj) - encrypt (Kj) the crumbs (Mi) of each group (Gj) by the participant assigned to the group with his public key (Kj) - group the encrypted crumbs (Kj (Mi) → Σ Kj [Gj (Mi)]) - hash (H) the source data (DS) by the holder (To) and encrypt the hash - compose the transformed data as a message (MC) combining the encrypted HX (DS) hash and the encrypted crumbs (Kj (Mi)). Figure 1

FR2007516A 2019-07-19 2020-07-17 Method for secure data storage and system for implementing the method Active FR3098953B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/FR2020/051295 WO2021014081A1 (en) 2019-07-19 2020-07-17 Method for secure data storage and system for implementing said method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1908258A FR3098950B3 (en) 2019-07-19 2019-07-19 "Method for secure data storage and system for implementing the method"
FR1908258 2019-07-19

Publications (2)

Publication Number Publication Date
FR3098953A1 FR3098953A1 (en) 2021-01-22
FR3098953B1 true FR3098953B1 (en) 2021-12-10

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FR1908258A Expired - Fee Related FR3098950B3 (en) 2019-07-19 2019-07-19 "Method for secure data storage and system for implementing the method"
FR2007516A Active FR3098953B1 (en) 2019-07-19 2020-07-17 Method for secure data storage and system for implementing the method

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR1908258A Expired - Fee Related FR3098950B3 (en) 2019-07-19 2019-07-19 "Method for secure data storage and system for implementing the method"

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Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10819506B2 (en) * 2015-10-07 2020-10-27 Nec Corporation Method for storing a data file
WO2017065209A1 (en) * 2015-10-16 2017-04-20 国立大学法人東北大学 Information processing system, information processing device, information processing method, and program
EP3379767B1 (en) * 2017-03-24 2021-01-13 Hewlett-Packard Development Company, L.P. Distributed authentication

Also Published As

Publication number Publication date
FR3098953A1 (en) 2021-01-22
FR3098950B3 (en) 2021-07-30
FR3098950A3 (en) 2021-01-22

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