Trusted Timestamp Server for Offline Data Transfer Control
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Solution Overview
Problem
Current data management mechanisms, such as cryptographic controls and software/firmware-embedded hardware controls, are vulnerable to reverse engineering and tampering, and legislation may not effectively reduce or stop data transfer rates, especially during offline transfers where the digital content provider lacks control over the clock used to enforce time-based transfer restrictions.
Innovation Solution
A method that fetches a non-modifiable time stamp over a network connection from a trustworthy clock, stores it on the electronic device, and determines whether a predetermined time interval has elapsed before allowing digital content transfer, thereby controlling the frequency of data transfer without relying on a secure local clock.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cryptographic controls are used to manage digital data access and usage, then data transfer control is improved, but the system becomes vulnerable to reverse engineering
Solution Approach 1:
The patent introduces a trusted timestamp server as an intermediary between the digital content system and the user's device. This server provides authoritative timestamps that cannot be generated or modified by the user, serving as a neutral mediator that proves when content was legitimately accessed without requiring the user's device to generate or store trustable time information.
Solution Approach 2:
The system performs preliminary verification by checking whether a sufficient time interval has elapsed since the content was legitimately accessed (as proven by the timestamp) before allowing transfer. This preliminary time-based check prevents unauthorized rapid re-transfers without needing to embed complex control logic in the user's device.
2Reliability
If software/firmware-embedded hardware controls are used to interact with operating system and media player software, then data transfer management is improved, but the system becomes vulnerable to tampering attacks
Solution Approach 1:
The trusted timestamp server acts as an external intermediary that removes the need for embedding trustable time-keeping functionality within the user's device. By obtaining timestamps from this external authoritative source, the system avoids the vulnerability of local clock manipulation while still enabling time-based transfer restrictions.
Solution Approach 2:
The patent extracts the time-keeping and trust functions from the user's device environment (where they are vulnerable to tampering) and places them in a separate, trusted timestamp server. This separation allows the user's device to focus only on verifying timestamps rather than maintaining secure time-keeping infrastructure.
3Reliability
If legislation and regulations are enacted to manage digital data access and usage, then data transfer control is improved, but the intended effect of reducing data transfer rate is not always achieved
Solution Approach 1:
The system enables automated enforcement of transfer restrictions by having the user's device automatically check timestamps and determine whether the required time interval has elapsed. This self-service approach eliminates the need for manual legislative enforcement and directly controls transfer rates through technical means.
Solution Approach 2:
The system implements feedback by continuously monitoring the time elapsed since legitimate content access (via timestamp verification) and using this information to dynamically control whether transfers are permitted. This closed-loop control ensures transfer rate restrictions are actively enforced rather than relying on passive legislative measures.
4Reliability
If a secure local clock is used to enforce time-based transfer restrictions, then offline transfer control is improved, but the clock can be manipulated to circumvent restrictions
Solution Approach 1:
The trusted timestamp server serves as an intermediary that provides authoritative time information without requiring the user's device to maintain or trust its own local clock. The timestamp acts as external proof of when content was legitimately accessed, making local clock manipulation irrelevant to the transfer control mechanism.
Solution Approach 2:
The system performs preliminary verification by checking the timestamp obtained from the trusted server before allowing any transfer. This preliminary check establishes the legitimate access time externally, so subsequent transfer decisions are based on this verified timestamp rather than the potentially manipulated local clock.
Data Source
AI summary
A method for controlling frequency of data transfer of an electronic device is disclosed. A time stamp is fetched over a network connection, wherein the time stamp is not modifiable at the electronic device. The time stamp is stored at the electronic device. In response to a request to transfer digital content, it is determined whether a predetermined time interval since a most recent transfer of the digital content has elapsed.