Dual-USIM Profile Provisioning for Secure SIM Activation
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Solution Overview
Problem
Existing systems for managing subscriber identification module (SIM) cards and profiles face security vulnerabilities due to reliance on third-party subscription management systems, which can compromise end devices and networks.
Innovation Solution
A security service for end device profiles that utilizes a symmetric or asymmetric key/certificate, preloading or generating a security key during manufacturing, and enabling secure switching between USIMs to reduce reliance on network devices for key storage and transmission, allowing secure activation and network connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If third-party systems are used to manage SIM cards and profiles, then service providers can outsource provisioning operations, but security exposures occur during provisioning and activation processes
Solution Approach 1:
The system segments the provisioning process into distinct phases: initial provisioning using a first USIM with limited capabilities, and activation provisioning using a second USIM with full capabilities. This segmentation allows outsourcing of initial provisioning to third-party systems while keeping sensitive activation operations secure and controlled, thus resolving the contradiction between outsourcing flexibility and security reliability.
Solution Approach 2:
The first USIM acts as an intermediary between the third-party provisioning system and the second USIM. It receives provisioning data from untrusted third-party systems, processes it securely using preloaded keys, and then provisions the second USIM. This intermediary mechanism enables outsourcing while maintaining security, as the first USIM mediates all interactions and prevents direct exposure of sensitive activation processes to third-party systems.
2Device complexity
If security keys are stored and transmitted through network devices, then provisioning can be centralized, but security exposures increase during key transmission
Solution Approach 1:
Security keys are preloaded into the first USIM during manufacturing before the device is deployed. This preliminary action eliminates the need to transmit sensitive security keys through network devices during provisioning and activation processes. The first USIM already possesses the necessary keys to securely provision the second USIM, thus achieving centralized provisioning capability without the security risks of key transmission.
Solution Approach 2:
The system extracts the security key storage and management function from network devices and places it directly into the first USIM. By taking out the sensitive key management operations from the network infrastructure and embedding them in the user equipment, the system achieves centralized provisioning control while eliminating the security vulnerabilities associated with key transmission through network devices.
3Device complexity
If a single USIM is used for all operations, then device simplicity is maintained, but security risks increase during provisioning and activation
Solution Approach 1:
The system segments the USIM functionality into two distinct entities: a first USIM for initial provisioning with preloaded security keys, and a second USIM for activation with full network capabilities. This segmentation separates security-critical functions from operation-critical functions, allowing the device to maintain simplicity during normal operation (using only the second USIM) while achieving enhanced security during provisioning and activation processes.
Solution Approach 2:
The first USIM serves as a security intermediary that handles all sensitive provisioning operations. During normal device operation, only the second USIM is active, maintaining device simplicity. However, during provisioning and activation, the first USIM mediates all security-critical operations, providing enhanced security without requiring the user to interact with or understand the dual-USIM structure. The intermediary first USIM handles security risks transparently while the second USIM maintains operational simplicity.
Data Source
AI summary
A method, a device, and a non-transitory storage medium are described in which a security service of end device profiles is provided. The service may include obtaining a profile for a card of an end device from a third party device in which the profile includes first and second executables. For example, the first and second executables may each include a subscriber identification module. The first executable may initialize and subsequently perform a switching procedure that enables the second executable to replace the use of the first executable. The first executable may also generate a key that can be used to provision the second executable on the end device.