US Patent No. 9,510,186

TAMPER PREVENTION FOR ELECTRONIC SUBSCRIBER IDENTITY MODULE (ESIM) TYPE PARAMETERS


Patent No. 9,510,186
Issue Date November 29, 2016
Title Tamper Prevention For Electronic Subscriber Identity Module (esim) Type Parameters
Inventorship Li Li, Los Altos, CA (US)
Xiangying Yang, Cupertino, CA (US)
Assignee Apple Inc., Cupertino, CA (US)

Claim of US Patent No. 9,510,186

1. A method for protecting a Type parameter of an electronic Subscriber Identity Module (eSIM) that is associated with a Mobile
Network Operator (MNO), the method comprising:
at an embedded Universal Integrated Circuit Card (eUICC):
receiving a request to store the eSIM within a memory that is accessible to the eUICC; and
in response to the request:
storing the eSIM into the memory,
parsing a file system of the eSIM to identify the Type parameter, and
updating a file access property of the Type parameter to prevent the Type parameter from being modified by the MNO.