Digital Signature for Device Property Authenticity
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Solution Overview
Problem
Current methods for transmitting operating values of dynamic device properties are insecure, making it difficult to ensure authenticity and integrity, and require time-consuming decryption when encrypted.
Innovation Solution
Generating an operating-value-dependent digital signature using a digital key to ensure authenticity and integrity, allowing immediate observation and evaluation without decryption, and updating the signature when values change beyond a predefined threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If operating values are transmitted in encrypted form, then security and authenticity are improved, but time-consuming decryption is required and immediate evaluation is prevented
Solution Approach 1:
The patent introduces digital signatures as an intermediary mechanism that provides security verification without requiring decryption. The signature acts as a mediator that proves authenticity while allowing direct observation of the encrypted operating values, thus resolving the time loss contradiction.
Solution Approach 2:
The patent segments the security verification process from the data transmission process. Instead of encrypting the entire operating value for verification, only a signature component is used for authentication, while the main data remains observable. This segmentation allows simultaneous security and immediate evaluation.
2Productivity
If operating values are transmitted in unprotected form, then immediate observation and evaluation are enabled, but security and integrity cannot be ensured
Solution Approach 1:
The digital signature serves as an intermediary that provides integrity verification without obstructing immediate observation. The signature is attached to the unprotected operating values, enabling both productivity (immediate evaluation) and reliability (integrity assurance) simultaneously.
Solution Approach 2:
The patent applies preliminary action by generating the digital signature before transmission. This pre-computed signature provides integrity protection in advance, allowing the operating values to be transmitted in unprotected form for immediate evaluation without compromising security.
3Reliability
If digital signatures are updated frequently to ensure authenticity, then security is improved, but computational overhead and processing time increase
Solution Approach 1:
The patent implements periodic action by updating digital signatures only when operating values change beyond a predefined threshold, rather than continuously. This threshold-based periodic updating maintains reliability while significantly reducing computational energy consumption compared to frequent updates.
Solution Approach 2:
The patent changes the parameter of signature update frequency from continuous to threshold-based. By monitoring operating value changes and triggering signature updates only when threshold violations occur, the system optimizes the balance between authenticity verification and computational energy usage.
Data Source
AI summary
The invention relates to a method for ensuring the authenticity of at least one value of a device property wherein the device property is a characteristic of a device (6). According to the invention, at least one operating value (14, 16) of at least one dynamic device property is signed using a digital key (20), wherein an operating-dependent digital signature (2) is generated.