eUICC Key Rotation for Remote Two-Factor Network Authentication
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Solution Overview
Problem
The rapid growth of machine-to-machine (M2M) applications has created challenges for traditional wireless networks, particularly in securely and efficiently distributing and managing network access credentials for embedded universal integrated circuit cards (eUICC) without physical intervention, as modules often operate in remote or sealed environments and may require frequent key changes to enhance security.
Innovation Solution
The system employs an embedded universal integrated circuit card (eUICC) that supports secure and efficient communication by allowing modules to remotely and automatically change network access credentials using cryptographic algorithms, ensuring control over key distribution and authentication, even when profiles are distributed outside the mobile network operator's control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional physical UICC cards are used for M2M devices, then initial network access authentication can be achieved, but key changes require physical intervention which is costly and impractical for remote or sealed devices
Solution Approach 1:
The patent replaces the mechanical/physical system of UICC card manipulation with an electronic/software-based system. The eUICC embedded in the module allows key changes to be performed remotely through electronic communication, eliminating the need for physical card removal, replacement, or rewriting operations. This substitution resolves the contradiction by making key changes as easy as sending a data command while removing all physical complexity.
Solution Approach 2:
The eUICC system enables the module to autonomously perform key changes without external physical intervention. The module can independently receive key change commands, process them through the eUICC, and update its network access credentials automatically. This self-service capability resolves the contradiction by making the device its own service provider for key management.
2Reliability
If eUICC is embedded in sealed modules for remote M2M applications, then device security and protection are improved, but physical access for key management is lost
Solution Approach 1:
The patent introduces an intermediary key management system that acts as a mediator between the module operator and the eUICC. This intermediary receives key change requests, processes them securely, and delivers updated credentials to the module through electronic channels. This intermediary resolves the contradiction by maintaining security through controlled access while enabling operational flexibility through remote key distribution.
Solution Approach 2:
The system separates the security functions into distinct components: the eUICC securely stores cryptographic material, the module manages communication, and the intermediary handles key distribution logistics. This segmentation allows each component to specialize in its function, maintaining high security while enabling flexible key management operations without physical access.
3Reliability
If frequent key changes are implemented to enhance security, then authentication security is improved, but operational complexity and management overhead increase
Solution Approach 1:
The automated key change system allows modules to independently undergo frequent key rotations without human intervention. The module automatically receives key change commands, processes them through the eUICC, and updates its credentials. This self-service approach resolves the contradiction by making frequent key changes operationally simple while maintaining high security through automated enforcement.
Solution Approach 2:
The system implements feedback mechanisms where the module reports its current key status and receives directed key change commands based on security policies. This feedback loop enables automated key management systems to orchestrate frequent key changes across multiple modules efficiently, reducing overall management complexity while maintaining high security standards through systematic control.
Data Source
AI summary
A module with an embedded universal integrated circuit card (eUICC) can include a profile for the eUICC. The profile can include a first and second shared secret key K for authenticating with a wireless network. The first shared secret key K can be encrypted with a first key, and the second shared secret key K can be encrypted with a second key. The module can (i) receive the first key, (ii) decrypt the first shared secret key K with the first key, and (iii) subsequently authenticate with the wireless network using the plaintext first shared secret key K. The wireless network can authenticate the user of the module using a second factor. The module can then (i) receive the second key, (ii) decrypt the second shared secret key K, and (iii) authenticate with the wireless network using the second shared secret key K. The module can comprise a mobile phone.