Modular Subscriber Identification System for IoT
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Solution Overview
Problem
Classic SIM cards are costly, energy-intensive, and space-consuming, making them unsuitable for low-cost, compact communications devices in the mobile Internet of Things due to high security and logistics demands.
Innovation Solution
A modular subscriber identification system comprising a first circuit module for storing and transmitting a subscriber ID and a second circuit module for securely storing and processing a cryptographic key, optimized for cost-effective integration and reduced energy consumption, using a system-on-a-chip design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If classic SIM cards are used for subscriber identification, then security requirements are met, but cost, installation space, and energy consumption increase significantly
Solution Approach 1:
The patent divides the traditional SIM card functionality into separate modules: a first circuit module for storing subscriber ID and a second circuit module for storing cryptographic keys. This segmentation allows each module to be optimized independently, reducing overall complexity and cost while maintaining security through specialized functions.
Solution Approach 2:
The patent extracts the cryptographic key storage and processing functions from the traditional SIM card into a separate second circuit module. This extraction reduces the complexity and cost of the main subscriber identification system while maintaining security through dedicated cryptographic handling in the separated module.
2Reliability
If classic SIM cards are integrated into communications devices, then subscriber identification is achieved, but installation space requirements increase
Solution Approach 1:
The patent merges the first circuit module (subscriber ID storage) and second circuit module (cryptographic key storage and processing) into an integrated modular system. This merging reduces the total installation space required compared to traditional SIM cards while maintaining full subscriber identification functionality through combined operations of the two specialized modules.
Solution Approach 2:
The patent transitions from the traditional physical SIM card format to a modular circuit module architecture that can be integrated at the chip level. This dimensional change from discrete card format to integrated circuit modules dramatically reduces installation space while preserving identification functionality.
3Reliability
If classic SIM cards are used in mobile IoT devices, then authentication is provided, but energy consumption increases
Solution Approach 1:
The patent segments authentication functions into two specialized modules: one for ID management and another for cryptographic operations. This segmentation allows each module to be optimized for low-power operation in its specific function, reducing overall energy consumption compared to the monolithic SIM card architecture.
Solution Approach 2:
The second circuit module is designed to autonomously handle cryptographic key processing and authentication computations. This self-service capability reduces the energy burden on the main communications device processor, lowering overall system energy consumption while maintaining secure authentication.
Data Source
AI summary
A subscriber identification system for identifying a subscriber in a communications network includes: a first circuit module in which at least a subscriber ID is stored, wherein the first circuit module comprises a first communications interface configured to receive a request signal for the subscriber ID and to transmit the subscriber ID in response to receiving the request signal; and a second circuit module in which at least a cryptographic key is stored, wherein the second circuit module comprises a second communications interface configured to receive an input parameter, wherein the second circuit module is configured to link the input parameter with the cryptographic key to obtain an output parameter, and wherein the second communications interface is configured to transmit the output parameter.