FR3140728B1 - Cryptographic processing method, associated electronic device and computer program - Google Patents

Cryptographic processing method, associated electronic device and computer program

Info

Publication number
FR3140728B1
FR3140728B1 FR2210262A FR2210262A FR3140728B1 FR 3140728 B1 FR3140728 B1 FR 3140728B1 FR 2210262 A FR2210262 A FR 2210262A FR 2210262 A FR2210262 A FR 2210262A FR 3140728 B1 FR3140728 B1 FR 3140728B1
Authority
FR
France
Prior art keywords
electronic device
processing method
private key
derived
cryptographic processing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
FR2210262A
Other languages
French (fr)
Other versions
FR3140728A1 (en
Inventor
Roch Lescuyer
Emmanuelle Dottax
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Idemia France SAS
Original Assignee
Idemia France SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Idemia France SAS filed Critical Idemia France SAS
Priority to FR2210262A priority Critical patent/FR3140728B1/en
Publication of FR3140728A1 publication Critical patent/FR3140728A1/en
Application granted granted Critical
Publication of FR3140728B1 publication Critical patent/FR3140728B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • H04L9/008—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols involving homomorphic encryption
    • 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
    • H04L9/30—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy
    • H04L9/3066—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy involving algebraic varieties, e.g. elliptic or hyper-elliptic curves
    • 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
    • H04L9/3218—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 proof of knowledge, e.g. Fiat-Shamir, GQ, Schnorr, ornon-interactive zero-knowledge proofs

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Physics & Mathematics (AREA)
  • Pure & Applied Mathematics (AREA)
  • Mathematical Optimization (AREA)
  • Computing Systems (AREA)
  • Mathematical Analysis (AREA)
  • General Physics & Mathematics (AREA)
  • Algebra (AREA)
  • Storage Device Security (AREA)

Abstract

Procédé de traitement cryptographique mis en œuvre par un dispositif électronique et comprenant :i) une phase d'initialisation (P1) comprenant:- l’enregistrement (E120) d’une clé privée racine dans une mémoire du dispositif électronique,ii) une phase de génération (P2) de clés comprenant:- le calcul (E220) d'une clé privée dérivée égale à f(s, k) où f est une fonction de dérivation, s est un sous-ensemble de la clé privée racine, et k est un scalaire secret,- le calcul (E240) d’une clé publique dérivée associée à la clé privée dérivée,iii) une phase de génération (P3) de preuve comprenant:- la génération (E320) d'une preuve à divulgation nulle de connaissance que la clef publique dérivée est associée à un scalaire égal à f(s, k), iv) une phase de transmission (P3) comprenant:- la transmission (E420) de la preuve à divulgation nulle de connaissance à un dispositif de vérification. Figure pour l’abrégé : fig. 3.A cryptographic processing method implemented by an electronic device and comprising:i) an initialization phase (P1) comprising:- recording (E120) a root private key in a memory of the electronic device,ii) a key generation phase (P2) comprising:- calculating (E220) a derived private key equal to f(s, k) where f is a derivation function, s is a subset of the root private key, and k is a secret scalar,- calculating (E240) a derived public key associated with the derived private key,iii) a proof generation phase (P3) comprising:- generating (E320) a zero-knowledge proof that the derived public key is associated with a scalar equal to f(s, k),iv) a transmission phase (P3) comprising:- transmitting (E420) the zero-knowledge proof to a verification device. Figure for abstract: Fig. 3.

FR2210262A 2022-10-06 2022-10-06 Cryptographic processing method, associated electronic device and computer program Active FR3140728B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR2210262A FR3140728B1 (en) 2022-10-06 2022-10-06 Cryptographic processing method, associated electronic device and computer program

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2210262 2022-10-06
FR2210262A FR3140728B1 (en) 2022-10-06 2022-10-06 Cryptographic processing method, associated electronic device and computer program

Publications (2)

Publication Number Publication Date
FR3140728A1 FR3140728A1 (en) 2024-04-12
FR3140728B1 true FR3140728B1 (en) 2025-09-05

Family

ID=85381052

Family Applications (1)

Application Number Title Priority Date Filing Date
FR2210262A Active FR3140728B1 (en) 2022-10-06 2022-10-06 Cryptographic processing method, associated electronic device and computer program

Country Status (1)

Country Link
FR (1) FR3140728B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4246880A1 (en) * 2022-03-18 2023-09-20 Proton World International N.V. Protecting a secret key

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018170341A1 (en) * 2017-03-15 2018-09-20 NuID, Inc. Methods and systems for universal storage and access to user-owned credentials for trans-institutional digital authentication
CN108667626B (en) * 2018-07-20 2020-03-03 陕西师范大学 Secure two-party collaboration SM2 signature method

Also Published As

Publication number Publication date
FR3140728A1 (en) 2024-04-12

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