Location-Bound Key Memory for Fast Security Device Replacement
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Solution Overview
Problem
Conventional security devices require frequent reparameterization and error detection during data exchange, leading to increased idle time and economic costs in production systems.
Innovation Solution
A security device with a non-volatile memory element for parameter data and a key memory with check-sum information, allowing dynamic calculation and comparison of check-sums to switch between secure and normal operating states, and enabling secure data exchange and recovery through a location-bound key memory.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional security devices are exchanged in production systems, then device replacement is possible, but reparameterization is required which increases idle time and economic costs
Solution Approach 1:
The patent applies preliminary action by pre-storing parameter data records with their corresponding check-sum information in non-volatile memory elements of the security device. This allows the device to be exchanged without reparameterization, as the new device already contains the necessary operational parameters and security verification data, eliminating idle time during device replacement.
2Ease of operation
If parameter data records are exchanged during security device replacement, then device functionality can be restored, but error detection during data exchange increases complexity and time requirements
Solution Approach 1:
The patent implements feedback through the comparator unit that automatically verifies parameter data records by comparing their check-sum information. This automated feedback mechanism simplifies the exchange process by providing immediate verification without requiring complex manual error detection procedures, reducing both operational complexity and time requirements.
Solution Approach 2:
The security device performs self-verification of parameter data records using its own calculation unit and comparator unit. The device autonomously checks the integrity of exchanged parameter data by comparing calculated check-sums with stored reference values, eliminating the need for external error detection systems and simplifying the overall exchange process.
3Reliability
If check-sum verification is performed for every parameter exchange, then data integrity is ensured, but processing time increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing check-sum information in non-volatile memory during device manufacturing or initial parameterization. When parameter data is exchanged, the system only needs to compare the new check-sum against the pre-stored reference, rather than performing full verification calculations, thus ensuring data integrity while minimizing verification time.
Data Source
AI summary
A security device includes at least one non-volatile memory element and a key memory having at least one non-volatile memory element including at least one data field. The security device provides a physical interface for the data exchange with a key memory, the range of the physical interface being spatially restricted, and the key memory being location-bound. The security device includes at least one calculation unit, which dynamically ascertains in particular the check-sum information from the parameter data record.