Personalization Table for Chip Card Memory Access
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Solution Overview
Problem
The existing personalization processes for electronic devices, such as chip cards and passports, require a substantial number of writing and selection commands, making the process lengthy and expensive, especially when dealing with complex devices that support multiple applications and evolving architectures.
Innovation Solution
A method that uses a table of identifiers to associate data items with data references, allowing direct access and processing without the need for file or container selection commands, and includes a step of creating entries in the table to initialize and authorize data processing, enabling efficient data initialization and personalization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional file tree structure with selection commands is used for data access, then data can be organized in a structured manner, but the personalization process requires a substantial number of writing and selection commands making it lengthy and expensive
Solution Approach 1:
The patent introduces an intermediary layer (the table of identifiers) between the processing unit and the data items. Instead of directly navigating the complex file tree structure through multiple selection commands, the processing unit uses this intermediary table that maps data identifiers to their actual locations. This intermediary structure simplifies the access path from multiple hierarchical selections to a single direct lookup operation, resolving the contradiction between structured data organization and simplified access procedures.
2Ease of operation
If direct access commands are provided for operator applications, then personalization can be simplified, but the solution requires data locations to be standardised and known in advance
Solution Approach 1:
The patent implements a dynamic solution where the table of identifiers is not hard-coded or predetermined but is instead created and populated during the personalization process itself. The processing unit dynamically generates entries in this table based on the actual data items present in the memory, regardless of their location in the file tree structure. This dynamic approach allows direct access commands to be used without requiring pre-standardized data locations, thus maintaining both ease of operation and adaptability to evolving device architectures.
3Productivity
If multiple writing commands are used to initialize data items in containers, then data can be written to various locations, but the process becomes lengthy and costly
Solution Approach 1:
The patent applies preliminary action by pre-establishing the table of identifiers that maps data identifiers to their storage locations before the actual data writing process begins. During personalization, when data items need to be written to containers, the processing unit can directly consult this pre-created table to determine the exact target locations, eliminating the need for multiple sequential writing commands to navigate through the file tree structure. This preliminary preparation of the identifier table significantly accelerates the data initialization process while reducing the number of commands required.
Data Source
AI summary
The invention relates to any electronic device such as a chip card, a passport, a dongle or any other object requiring personalization of the content of a memory. More precisely, the invention provides for a method for processing a data item of a container stored in a memory, said method being implemented by the electronic device by utilizing in particular a table of identifiers. The invention furthermore provides for a prior step for associating a data identifier with a data item of a container and creating said table of identifiers.