Timed Erasure Mechanism for Portable Secure Media
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Solution Overview
Problem
Portable computer-readable media, such as USB drives and SD cards, pose security risks due to their small size and frequent use, as they can be lost or compromised, potentially exposing sensitive security information like passwords and keys.
Innovation Solution
Incorporating circuitry that automatically erases data on these media after a predefined time period, which can be reset when connected to a powered device, using a voltage controller or digital timer to ensure secure data protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If data is stored on portable computer-readable media for extended periods, then usability and convenience are improved, but security risks increase due to potential loss or compromise of the media
Solution Approach 1:
The patent implements periodic erasure of data stored on portable media by using a timer circuit that automatically deletes data after a predetermined time period. This periodic action (time-based erasure) resolves the contradiction by limiting how long sensitive data remains on the media, thereby reducing security risks while still allowing sufficient time for legitimate use.
Solution Approach 2:
The patent changes the temporal parameter of data retention by introducing a time limit. The controller circuit is configured to erase data after a predetermined duration, transforming the storage medium from indefinite retention to time-bound retention. This parameter change directly addresses the security concern while preserving usability within the allowed time frame.
2Object-affected harmful factors
If data is automatically erased after a predefined time period, then security risks are minimized, but data availability and usability are reduced
Solution Approach 1:
The patent makes the data retention period dynamic and configurable. The predetermined time period can be adjusted based on specific security requirements and usability needs. This dynamic approach allows optimization of the balance between security (shorter retention) and availability (longer retention) depending on the application context.
Solution Approach 2:
The system performs preliminary erasure of data before it would be exposed to security risks by automatically deleting it after the predetermined time period. This preliminary action (proactive erasure) ensures that data is removed before potential compromise, resolving the contradiction by proactively managing the security-availability tradeoff.
3Object-affected harmful factors
If circuitry for automatic erasure is added to portable media, then security is improved, but device complexity increases
Solution Approach 1:
The patent merges the erasure function with the existing controller circuit of the portable media device. Rather than adding a completely separate erasure mechanism, the controller is configured to perform both normal operations and time-based erasure functions. This merging reduces the overall complexity increase by consolidating functions into existing hardware.
Solution Approach 2:
The device provides self-service security by automatically erasing its own data without requiring external intervention. The timer circuit and controller work autonomously to monitor elapsed time and execute erasure when the predetermined period expires. This self-service approach minimizes the need for additional complex control systems while achieving the security goal.
Data Source
AI summary
A timed erasure mechanism can be used with portable computer-readable media to ensure automatic erasure of secure information, minimizing the security risks in using such media to store and transport passwords, codes, keys and similar private setup information. The portable computer-readable media can comprise volatile memory and a timed erasure mechanism in the form of a power supply and discharging circuitry that discharges the power supply after a predetermined amount of time. Alternatively, the portable computer-readable media can comprise nonvolatile memory and a timed erasure mechanism in the form of a digital time and erasure algorithms that are initiated after a predetermined amount of time. Furthermore, such portable computer-readable media can comprise a container that bears unique physical properties that can alert users to the volatile nature of the media.