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1. WO2019246206 - AN ECDHE KEY EXCHANGE FOR SERVER AUTHENTICATION AND A KEY SERVER

Publication Number WO/2019/246206
Publication Date 26.12.2019
International Application No. PCT/US2019/037911
International Filing Date 19.06.2019
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 9/006
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
9Cryptographic mechanisms or cryptographic; arrangements for secret or secure communication
006involving public key infrastructure [PKI] trust models
H04L 9/0662
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
065Encryption by serially and continuously modifying data stream elements, e.g. stream cipher systems, RC4, SEAL or A5/3
0656Pseudorandom key sequence combined element-for-element with data sequence, e.g. one-time-pad [OTP] or Vernam's cipher
0662with particular pseudorandom sequence generator
H04L 9/0841
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
0838Key agreement, i.e. key establishment technique in which a shared key is derived by parties as a function of information contributed by, or associated with, each of these
0841involving Diffie-Hellman or related key agreement protocols
H04L 9/3066
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
3066involving algebraic varieties, e.g. elliptic or hyper-elliptic curves
H04L 9/3247
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
3247involving digital signatures
H04L 9/3263
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
3263involving certificates, e.g. public key certificate [PKC] or attribute certificate [AC]; Public key infrastructure [PKI] arrangements
Applicants
  • IOT AND M2M TECHNOLOGIES, LLC [US/US]; 807 Davis Street, Unit 2207 Evanston, IL 60201-7104, US
Inventors
  • NIX, John, A.; US
Agents
  • THOMSON, Kirsten, L.; US
Priority Data
62/687,41120.06.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) AN ECDHE KEY EXCHANGE FOR SERVER AUTHENTICATION AND A KEY SERVER
(FR) ÉCHANGE DE CLÉS ECDHE POUR AUTHENTIFICATION DE SERVEUR, ET SERVEUR DE CLÉS
Abstract
(EN)
A server can receive a device public key and forward the device public key to a key server. The key server can perform a first elliptic curve Diffie-Hellman (ECDH) key exchange using the device public key and a network private key to derive a secret XL The key server can send the secret X1 to the server. The server can derive an ECC PKI key pair and send to the device the server public key. Tire server can conduct a second ECDH key exchange using the derived server secret key and the device public key to derive a secret X2. The server can perforin an ECC point addition using the secret XI and secret X2 to derive a secret X3. The device can derive the secret X3 using (i) the server public key, a network public key, and the device private key and (ii) a third ECDH key exchange.
(FR)
L'invention fait intervenir un serveur pouvant recevoir une clé publique de dispositif et transmettre la clé publique de dispositif à un serveur de clés. Le serveur de clés peut effectuer un premier échange de clés de Diffie-Hellman à courbe elliptique (ECDH) en utilisant la clé publique de dispositif et une clé privée de réseau pour déduire un secret X1. Le serveur de clés peut envoyer le secret X1 au serveur. Le serveur peut déduire une paire de clés PKI d'ECC et envoyer au dispositif la clé publique de serveur. Le serveur peut procéder à un deuxième échange de clés ECDH en utilisant la clé secrète de serveur déduite et la clé publique de dispositif pour déduire un secret X2. Le serveur peut effectuer un ajout de point d'ECC en utilisant le secret XI et le secret X2 pour déduire un secret X3. Le dispositif peut déduire le secret X3 en utilisant (i) la clé publique de serveur, une clé publique de réseau, et la clé privée de dispositif et (ii) un troisième échange de clés ECDH.
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