Patent ID: 10003965

Abstract:
An eUICC 100 embedded in an UE 200 authenticates an AUTN transmitted from an HSS 300, and calculates a transfer key TK by using a secret key K. The eUICC 100 acquires a transfer Token by decoding an enc Token by using the transfer key TK, and acquires a new Customer ID by decoding an enc New ID by using the transfer key TK. The eUICC 100 transmits a user auth resp in response to a User auth+transfer Setup Req including the AUTN, the enc Token, and the enc New ID to the HSS 300. The eUICC 100 generates a shared-Secret Key shared between the eUICC 100 and an HSS 400 by using the transfer Token, and executes an attach procedure for the HSS 400 by using the generated shared-Secret Key and the new Customer ID.