Transponder Memory Access Control for Data Integrity
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Solution Overview
Problem
Conventional transponders lack secure mechanisms to prevent manipulation of memory content, particularly in product-related applications, allowing falsification of origin data or unique assignability by altering information.
Innovation Solution
A transponder system with a data memory comprising a first and second memory area, where the first memory area determines access rights, allowing either a predefined data stream or no data to be transmitted from the second memory area, ensuring secure configuration and locking to prevent changes once the first memory area is set to a specific value, thereby securing user data against rewriting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If memory content can be changed at any time for flexibility, then adaptability is improved, but data integrity and security deteriorate due to potential manipulation
Solution Approach 1:
The memory is divided into a first memory area (controlling memory area) and a second memory area (data storage area). The first memory area stores control values that determine the accessibility and programmability of the second memory area, enabling selective control over data integrity while maintaining adaptability.
Solution Approach 2:
The system performs preliminary actions by storing control values in the first memory area before data operations on the second memory area. These pre-stored control values dictate whether the second memory area can be read or written, preventing unauthorized manipulation before it occurs.
2Ease of operation
If all memory areas are always accessible for reading, then ease of operation is improved, but security and data protection deteriorate
Solution Approach 1:
Different memory areas have different access qualities controlled by values in the first memory area. The second memory area can be configured to be fully accessible, partially accessible, or completely inaccessible (returning dummy data), allowing localized security control without affecting overall system operation.
Solution Approach 2:
The first memory area acts as an intermediary controlling layer between the base station and the second memory area. It mediates access requests by evaluating control values and either permitting legitimate access or returning dummy data to prevent unauthorized access to sensitive information.
3Object-affected harmful factors
If dummy data is transmitted instead of memory content, then data security is improved, but information availability deteriorates
Solution Approach 1:
The access control mechanism is dynamic rather than static. The same first memory area can store different control values at different times, allowing the second memory area to switch between being fully accessible, partially accessible, or returning dummy data, adapting to different operational requirements.
Solution Approach 2:
The system changes parameters (control values in the first memory area) to control the state of data accessibility. By modifying these control values, the system can transition between different access modes: full access, partial access, or dummy data transmission, balancing security and information availability as needed.
Data Source
AI summary
A transponder having a transmitting and receiving device for receiving commands and transmitting data and command processor for executing commands, and a programming device for changing the memory contents, and a data memory which has a first memory area and a second memory area, whereby the first memory area has the first value or a second value, and when the first memory area has the first value, the content of both memory areas can be changed and, in the case of read access to the second memory area, the transmitting/receiving device transmits a predefined or no data stream instead of the memory content of the second memory area.