Secure Element Clear List for Factory Reset Data Removal
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The process of performing a factory reset on a smartphone with a secure element loaded is cumbersome due to the need for encryption communication with multiple Trusted Service Managers (TSMs, leading to long data communication and processing times.
Innovation Solution
An electronic device with a processor and secure element that receives and installs application packages, storing identification information in a list, allowing for the uninstallation of indicated packages without server communication, utilizing a clear list for efficient data removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the secure element performs encryption communication with all TSMs to remove data, then data security is maintained, but the time required for data removal and communication traffic increase
Solution Approach 1:
The patent applies preliminary action by maintaining a local clear list that pre-records the identification information of application packages to be removed. When a factory reset is triggered, the secure element can immediately remove the specified packages by referencing this pre-prepared list without needing to communicate with each TSM individually, thus significantly reducing data removal time while maintaining security through controlled access to the clear list
2Reliability
If the secure element performs encryption communication with all TSMs to remove data, then proper authorization is verified, but the number of communication operations increases
Solution Approach 1:
The patent extracts the essential authorization verification function from multiple TSM communications and consolidates it into a single clear list management mechanism. The clear list, which contains pre-authorized package identification information, is stored locally in the secure element, allowing rapid removal operations without repeated authorization requests to external TSMs, thus improving productivity while maintaining proper authorization through the pre-established clear list
Data Source
AI summary
An electronic device includes a secure element in which at least one application package is installed and a processor for communicating with the secure element. The secure element further stores a list with which a part or all of identification information of the at least one application package is registered. The processor controls the secure element such that an application package indicated by the identification information registered with the list is uninstalled, in response to a specified event. Various other embodiments recognized from the specification are also possible.