Key Distribution System Outsourced Encryption Verification
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Solution Overview
Problem
Existing key distribution systems cannot verify whether a device outsourced for encryption processing has the right to use content, risking unauthorized distribution of key data.
Innovation Solution
A key distribution system that includes an outsource source encryption device generating and transmitting second license information to verify the legitimacy of an outsource destination encryption device, and a key distribution device judging and transmitting key data only if the verification is successful.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If key data is distributed to outsource destination devices, then encryption processing can be outsourced to multiple devices, but the key distribution device cannot confirm whether the outsource destination device has the right to use the content
Solution Approach 1:
The system performs preliminary verification by including first license information in the second license information before key data distribution. This allows the key distribution device to confirm the outsource destination device's authorization in advance, ensuring reliable verification while maintaining outsourcing capability.
Solution Approach 2:
The second license information acts as an intermediary credential that bridges the outsource source device and the key distribution device. It carries verification data from the outsource source device, enabling the key distribution device to authenticate the outsource destination device without direct trust establishment.
2Reliability
If license information is embedded within license information, then verification data can be included, but the data structure becomes more complex
Solution Approach 1:
The patent implements nesting by embedding first license information within second license information. The second license information contains the first license information as a nested component, allowing verification data to be included in a structured, hierarchical manner that maintains organization despite increased complexity.
Data Source
AI summary
A key distribution system distributes key data for using content to a second encryption device that has been legitimately outsourced processing by a first encryption device. The first encryption device acquires permission information indicating that the first encryption device has permission to use the content, generates certification information by making an irreversible alteration the to permission information, and transmits the permission information and the certification information to the second encryption device. The second encryption device receives the permission information and the certification information, sends them to a key distribution device, and acquires the key data from the key distribution device. The key distribution device receives the permission information and the certification information, judges whether or not the certification information was generated by the by the first encryption device, and if judging in the affirmative, transmits the key data to the second encryption device.