Some time ago Apple filed in the Bureau of patents and trademarks United States application, which describes the new system, complicating the process of tracking identifier IMSI (international mobile subscriber identifier) for Apple smartphones.
In some cases, unique identifiers IMSI are used to identify the location of individual mobile device and even track traffic and listening to calls. Most often, owners of systems that allow you to perform such actions, are state agencies. However, something similar can be used by criminals.
Based on the information in the patent application, Apple engineers propose to establish a special encryption system, which will significantly complicate the process of determining the unique identifier of the mobile device. Theoretically cupertinos can create something similar to the end-to-end encryption.
It is worth noting that in recent years Apple has increased its focus on protection of user data. In the past cupertinos repeatedly refused to unlock the device and to provide user data to law enforcement.