Copy-Protected Data Carrier for Original-Only Appliance Processing
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Solution Overview
Problem
Existing methods for securing access to digital data in household appliances fail to ensure that only original data are used, as they do not prevent unauthorized access or manipulation of process control data, which can lead to incorrect processing of information.
Innovation Solution
A method where digital data on a data carrier is secured with a unique identifier and signature, using asymmetric cryptography, ensuring that only the original data can be processed by the appliance, while allowing copies to be readable by other devices but not usable for processing, by verifying the signature and serial number relationship.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If digital data is secured with signature and identifier verification, then data integrity and security are improved, but accessibility and ease of operation deteriorate
Solution Approach 1:
The data on the data carrier is segmented into two distinct parts: a signed identifier (security component) and information components (content). This segmentation allows the system to verify authenticity through the signed identifier while permitting unrestricted reading and display of the information components, thus resolving the contradiction between security and accessibility
Solution Approach 2:
The signed identifier acts as an intermediary between the data carrier and the electronic data processing device. It provides the necessary verification mechanism for authenticity without directly restricting access to the information components, enabling both security verification and data accessibility to coexist
2Object-affected harmful factors
If copy protection is implemented through signature verification, then unauthorized access is prevented, but legitimate use by multiple devices is restricted
Solution Approach 1:
Different quality requirements are applied to different parts of the data: the signed identifier requires strict verification for authenticity, while the information components are made universally readable. This local differentiation in access control allows unauthorized access to be prevented while maintaining broad device compatibility for legitimate use
Solution Approach 2:
Instead of restricting access to all data through signature verification, the system inverts the approach by allowing free access to information components while requiring verification only for the signed identifier. This inversion enables multiple devices to legitimately access the data while still preventing unauthorized modifications
Data Source
AI summary
A method for storing digital data information on a data carrier and for reading the information therefrom uses a disk having an individual digital identifier. A signature is formed, and the information includes information items, which can be processed by a first electronic data processing device only if the identifier and the signature are in a predefined relation to one another. To supply a household appliance operated by an electric motor with process control data, while ensuring that only original data are used, the information components can be processed by a second electronic data processing device even if the signature and the identifier are not in the predefined relation to one another. Also, a household appliance operable by an electric motor, in particular a food processor, has an electronic data processing device. A system and an integrated semiconductor circuit also realize the features for storing digital data information.