eUICC Binding Verification for Secure User Device Configuration
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Solution Overview
Problem
Existing methods fail to ensure a secure and functionally reliable interaction between embedded secure elements, such as eUICCs, and user devices, particularly in assigning them to specific user devices effectively.
Innovation Solution
A method involving predefining a command data set with operating commands, checking the binding between the device assembly and the secure element, and denying unauthorized commands to ensure a secure and reliable interaction, which can be adapted to specific requirements through authorization conditions and restricted operating modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If secure elements are embedded in user devices, then security requirements are met and identification features are protected, but the ability to assign secure elements to specific user devices based on external characteristics is lost
Solution Approach 1:
The patent implements a binding check before executing operating commands. The device assembly verifies whether a secure element is bound to it in advance, storing and comparing binding identifiers (such as device IDs or serial numbers) to ensure the secure element was intended for this specific device. This preliminary verification resolves the contradiction by maintaining security while enabling proper device assignment.
2Reliability
If binding checks are implemented for secure elements, then unauthorized commands are prevented and security is enhanced, but the complexity of the command execution process increases
Solution Approach 1:
The patent segments the command execution process into distinct phases: a binding check phase that verifies the secure element's authorization, and an execution phase that processes legitimate commands. By separating the verification logic from the command processing logic, the system enhances security through mandatory binding validation while managing complexity through structured process division.
Data Source
AI summary
Disclosed is a method, a computer program, a computer-readable data carrier, a user device having a device assembly on which a secure element, in particular an eUICC, is installed, and a device arrangement for user devices, for example mobile user devices, for participation in a telecommunication network. The method includes the following steps: predefining a command data set with operating commands for the user device; checking a binding between the device assembly and the secure element; and denying at least one of the operating commands if the check has indicated that no authorized binding is present.