Search International and National Patent Collections

1. (WO2018033364) AUTHENTICATION SERVER OF A CELLULAR TELECOMMUNICATION NETWORK AND CORRESPONDING UICC

Pub. No.:    WO/2018/033364    International Application No.:    PCT/EP2017/069073
Publication Date: Fri Feb 23 00:59:59 CET 2018 International Filing Date: Fri Jul 28 01:59:59 CEST 2017
IPC: H04W 12/06
H04L 9/32
Applicants: GEMALTO SA
Inventors: PHAN, Ly Thanh
Title: AUTHENTICATION SERVER OF A CELLULAR TELECOMMUNICATION NETWORK AND CORRESPONDING UICC
Abstract:
The invention proposes an authentication server of a cellular telecommunication network, the authentication server being arranged for generating an authentication token to be transmitted to a telecommunication terminal, the authentication token comprising a message authentication code and a sequence number, wherein the message authentication code is equal to: MACx = KIdx XOR f1 (AMF, SQNx, RAND,K) with KIdx being a key index information in the form of a bias of a MAC equal to: MAC = f1(K,AMF,SQNx, RAND) with f1 being a function, K a key, RAND a random number and SQNx a sequence counter relative to a corresponding key Kx derived from the key K and KIdx, and AMF the content of an authentication management field as defined in 3GPP TS 33.102.