US 12,074,972 B2
Method for updating a secret data in a credential container
Michel Anslot, Gemenos (FR); and Jean-Yves Fine, Gemenos (FR)
Assigned to THALES DIS FRANCE SAS, Meudon (FR)
Appl. No. 17/270,605
Filed by THALES DIS FRANCE SAS, Meudon (FR)
PCT Filed Aug. 22, 2019, PCT No. PCT/EP2019/072512
§ 371(c)(1), (2) Date Feb. 23, 2021,
PCT Pub. No. WO2020/048787, PCT Pub. Date Mar. 12, 2020.
Claims priority of application No. 18306170 (EP), filed on Sep. 5, 2018.
Prior Publication US 2021/0258156 A1, Aug. 19, 2021
Int. Cl. H04L 9/08 (2006.01); H04L 9/06 (2006.01); H04L 9/32 (2006.01); H04W 12/0431 (2021.01); H04W 12/06 (2021.01); H04W 12/30 (2021.01)
CPC H04L 9/0891 (2013.01) [H04L 9/0656 (2013.01); H04L 9/3273 (2013.01); H04W 12/0431 (2021.01); H04W 12/06 (2013.01); H04W 12/35 (2021.01)] 17 Claims
OG exemplary drawing
 
1. A method for updating a first secret data in a credential container including a subscriber identity module:
wherein the first secret data is a subscriber authentication key uniquely assigned to the subscriber identity module;
wherein said credential container comprises a set of secret parameters customized for a network operator; said secret parameters being specific to the network operator and distinct from the first secret data;
wherein said credential container is configured to execute a first algorithm designed only to perform symmetric mutual authentication with a remote server using said set to authenticate to a communication network, wherein all secret parameters of said set are initially provided only for execution of the first algorithm by the credential container; and
wherein the credential container receives from the remote server a second secret data enciphered by using a second algorithm which is an enciphering algorithm and a subset of said secret parameters; and
wherein the credential container deciphers the enciphered second secret data by using both the subset and a third algorithm which is a deciphering algorithm and replaces the first secret data with the second secret data.