Flash Memory Access Control via Device Certificate Verification
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Solution Overview
Problem
Current content protection systems, such as AACS, inadequately address copyright and usage control for content stored on flash memory devices like USB memory cards, lacking specifications for secure usage and access management.
Innovation Solution
An information processing device and method that includes a memory with a protected area for data recording, where access is restricted through a data processing unit verifying device certificates and access control information, ensuring controlled writing and reading based on access permissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If content is stored on flash memory devices without access control mechanisms, then ease of operation is improved, but copyright protection and usage control deteriorate
Solution Approach 1:
The storage medium is divided into a protected area and a non-protected area. The protected area stores content subject to access control, while the non-protected area stores other data. This segmentation allows differential access control policies to be applied, protecting copyrighted content while maintaining ease of operation for non-sensitive operations.
Solution Approach 2:
A data processing unit acts as an intermediary between access requests and the protected content. This unit verifies device certificates and access control information before permitting access to the protected area, thereby enforcing copyright protection without requiring users to be aware of the complex security mechanisms.
2Reliability
If access control verification is implemented for protected areas, then copyright protection is improved, but device complexity increases
Solution Approach 1:
The system performs self-verification by automatically checking device certificates and access control information stored in the protected area against predefined criteria. This automated self-service approach reduces the need for complex external verification systems and manual intervention, thereby limiting the increase in device complexity.
3Reliability
If a protected area with access restrictions is established, then copyright protection is improved, but ease of operation deteriorates
Solution Approach 1:
The data processing unit serves as an intermediary that transparently handles access control verification. Users interact with the system as usual, while the intermediary automatically verifies device certificates and access control information in the background, thus maintaining ease of operation for authorized users without compromising copyright protection.
Data Source
Figure 1A~1C
Figure 2
Figure 3
AI summary
An information processing device includes: a memory having a protected area which is a data recording area in which access restriction is set; and a data processing unit that determines accessibility in response to a request for accessing the protected area from an access requesting device, wherein the data processing unit verifies a device certificate received from the access requesting device and determines accessibility to the protected area based on access control information recorded in the device certificate.