Patent ID: 9628981
Date: 2017-04-18
CPC Classifications: H04L,H04W

Claim:
1. A method of changing a mobile network operator (MNO) using an embedded Subscriber Identity Module (eSIM) linked to at least one MNO, the eSIM storing a provisioning profile and a profile of the at least one MNO, the method comprising: receiving a security domain (SD) of a receiving MNO from a donor MNO, wherein the SD is a privileged application having a cryptographic key; performing an SD extradition from an SD of the donor MNO and replacing the SD of the donor MNO with the received SD; connecting to the receiving MNO using the provisioning profile; conducting SD authorization by using the cryptographic key of the SD of the receiving MNO and receiving a necessary profile or data based on a result of the SD authorization; inactivating a profile of the donor MNO when the eSIM receives the SD of the receiving MNO having a delegated management privilege or an authorized management privilege over the receiving MNO, from the donor MNO system; and changing a key value of the cryptographic key of the SD of the receiving MNO to a unique key value recognized only by the receiving MNO after the eSIM is issued with the necessary profile or data for the receiving MNO, wherein the SD of the donor MNO manages a first profile of the donor MNO by using a cryptographic key of the SD of the donor MNO and the SD of the receiving MNO manages a second profile of the receiving MNO by using the cryptographic key of the SD of the receiving MNO.