Dynamic Media Access Control via Temporal Deactivation
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Solution Overview
Problem
Existing methods for managing access to digital media files, such as using NFC blocker cards or two-code entry systems, are not 100% effective and can be cumbersome, particularly for conventional smartphones.
Innovation Solution
A method and system that links a digital terminal, like a smartphone, to an account on a media server, where a media file can be played or executed for a predefined limited period, requiring re-authentication when the account is accessed by another user, and optionally allows playback for a multiple of the intended playback time, using NFC identifiers for easy access and continued playback from the last position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If NFC blocker cards or two-code entry systems are used to protect media files, then unauthorized access is reduced, but user convenience deteriorates and additional costs are incurred
Solution Approach 1:
The patent implements dynamic access control where the media file's accessibility changes over time. The file is automatically deactivated after a predetermined period, requiring re-authentication for continued access. This temporal dynamics resolves the contradiction by providing strong protection (reliability) while maintaining simplicity (ease of operation) - users just need to re-enter their code periodically rather than using complex blocker cards or multiple codes continuously.
Solution Approach 2:
The system employs periodic re-authentication where the media file becomes inaccessible after a set time period and requires the user to enter their authorization code again. This periodic action ensures continuous protection against unauthorized access while keeping the interface simple - users only need to re-enter their existing code rather than managing additional security devices or complex multi-code systems.
2Ease of operation
If permanent access is granted after purchasing media files, then user satisfaction improves, but unauthorized distribution increases
Solution Approach 1:
The patent transforms static permanent access into dynamic temporary access. Media files are provided with a predetermined lifespan after which they automatically become inaccessible. This resolves the contradiction by balancing user satisfaction (easy access during the valid period) with protection against unauthorized distribution (automatic deactivation prevents long-term piracy). Users experience convenient access during their subscription period while the system inherently limits permanent distribution.
Solution Approach 2:
The system changes the time parameter of media file accessibility. Instead of permanent access, files are granted access for a predetermined period. This parameter change (from infinite time to finite time) simultaneously achieves user satisfaction through easy access during the valid period while preventing unauthorized distribution by automatically expiring the access rights after the specified duration.
3Reliability
If access control measures are implemented, then media file protection improves, but system complexity increases
Solution Approach 1:
The patent extracts the complexity from the user side and places it on the system side. The media file itself contains the access control logic (predetermined deactivation period) rather than requiring complex user management. This resolves the contradiction by providing robust protection (the file automatically self-destructs after the period) while keeping the user interface simple (users just use their existing account credentials without managing additional security mechanisms).
Solution Approach 2:
The media file implements self-service access control by automatically deactivating itself after a predetermined period without requiring external intervention. The system embeds the protection mechanism within the file structure, making it self-regulating. This resolves the contradiction by ensuring reliable protection (automatic deactivation) while minimizing system complexity from the user perspective (no additional controls or configurations needed).
Data Source
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AI summary
A method for managing access to digital media files is described, which media files are provided by a media server (2) via a computer network (3) and, after being downloaded to a digital terminal (4), are played or executed by application software (4a) running on the digital terminal (4) using the digital terminal (4), characterized in that a) the digital terminal (4) and/or its user (6) is linked to an account (2c) on the media server (2) or with a higher-level administrative institution and, in connection with the download of a respective media file to the digital terminal (4), a corresponding entry is made in the account (2c), whereupon the media file is played or executed by the digital terminal (4) at most until a similar entry is made in another such account;and/or b) a respective media file is played or executed by the digital terminal (4) for a maximum of a predefined limited period of time.;