Microcircuit Card Post-Personalization Performance Modification
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Solution Overview
Problem
Existing microcircuit cards cannot modify their performance after personalization, requiring users to change cards for new functionalities, limiting post-allocation customization.
Innovation Solution
A microcircuit card with means to modify hardware or software characteristics after personalization, using cryptographic authentication and protocols like SMS, to enhance or degrade performance, including memory size, clock frequency, and software functions, while ensuring secure and unique command execution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the microcircuit card performance is fixed after personalization, then the card security and stability are improved, but the adaptability and versatility deteriorate
Solution Approach 1:
The patent applies the dynamics principle by enabling the microcircuit card to transition from a static, fixed-performance state to a dynamic, configurable state. The card includes modification means that allow performance parameters (such as clock frequency, memory size, or software functionality) to be changed after personalization through reception of configuration commands, thus resolving the contradiction between stability and adaptability
Solution Approach 2:
The patent implements parameter changes by providing mechanisms to modify specific performance parameters of the microcircuit card after personalization. The modification means can change parameters like clock frequency, memory usable area, or software function availability based on received commands, allowing the card to adapt its performance characteristics while maintaining security through authentication protocols
2Adaptability or versatility
If the microcircuit card allows performance modification after personalization, then the adaptability and versatility are improved, but the device complexity and security requirements worsen
Solution Approach 1:
The patent applies universality by designing the modification means to handle multiple types of performance parameters through a unified command reception and processing system. The card can modify various characteristics (clock frequency, memory size, software functions) using the same basic mechanism of receiving and processing configuration commands, thus reducing overall system complexity despite the enhanced adaptability
3Ease of operation
If the microcircuit card enables post-personalization modification, then the ease of operation and customization are improved, but the loss of information and security risks worsen
Solution Approach 1:
The patent implements feedback mechanisms through authentication protocols that verify the legitimacy of modification commands before allowing performance changes. The card receives commands, authenticates them using cryptographic methods, and only executes valid modifications, thus preventing unauthorized changes and information loss while maintaining ease of legitimate customization
Data Source
AI summary
The invention concerns a microcircuit card comprising means (RX) for receiving a command and means for modifying at least one performance of the card capable of being implemented after a step of personalization of the card.